diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..04975e2
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,11 @@
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+insert_final_newline = true
+
+[*.{rs,toml}]
+indent_size = 4
diff --git a/biome.json b/biome.json
new file mode 100644
index 0000000..0cc7a82
--- /dev/null
+++ b/biome.json
@@ -0,0 +1,36 @@
+{
+  "$schema": "https://biomejs.dev/schemas/2.3.6/schema.json",
+  "vcs": {
+    "enabled": true,
+    "clientKind": "git",
+    "useIgnoreFile": true
+  },
+  "files": {
+    "includes": ["**", "!!**/dist"]
+  },
+  "formatter": {
+    "enabled": true,
+    "formatWithErrors": true,
+    "attributePosition": "auto",
+    "indentStyle": "space",
+    "indentWidth": 2,
+    "lineWidth": 110,
+    "lineEnding": "lf"
+  },
+  "javascript": {
+    "formatter": {
+      "arrowParentheses": "always",
+      "bracketSameLine": false,
+      "bracketSpacing": true,
+      "jsxQuoteStyle": "double",
+      "quoteProperties": "asNeeded",
+      "semicolons": "always",
+      "trailingCommas": "all"
+    }
+  },
+  "json": {
+    "formatter": {
+      "trailingCommas": "none"
+    }
+  }
+}
diff --git a/flake.nix b/flake.nix
index dffb1d1..dd2e7c3 100644
--- a/flake.nix
+++ b/flake.nix
@@ -26,9 +26,9 @@
               valgrind
               claude-code
 
-              # Node.js tooling for TypeScript build
               nodejs
               nodePackages.npm
+              biome
             ];
           };
         }
diff --git a/nix-js/runtime-ts/src/builtins/arithmetic.ts b/nix-js/runtime-ts/src/builtins/arithmetic.ts
index 43aac79..6d6f879 100644
--- a/nix-js/runtime-ts/src/builtins/arithmetic.ts
+++ b/nix-js/runtime-ts/src/builtins/arithmetic.ts
@@ -2,52 +2,68 @@
  * Arithmetic builtin functions
  */
 
-import type { NixBool, NixInt, NixNumber, NixValue } from '../types';
-import { force_numeric, coerce_numeric, force_int } from '../type-assert';
+import type { NixBool, NixInt, NixNumber, NixValue } from "../types";
+import { force_numeric, coerce_numeric, force_int } from "../type-assert";
 
-export const add = (a: NixValue) => (b: NixValue): bigint | number => {
-  const [av, bv] = coerce_numeric(force_numeric(a), force_numeric(b));
-  return (av as any) + (bv as any);
-};
+export const add =
+  (a: NixValue) =>
+  (b: NixValue): bigint | number => {
+    const [av, bv] = coerce_numeric(force_numeric(a), force_numeric(b));
+    return (av as any) + (bv as any);
+  };
 
-export const sub = (a: NixValue) => (b: NixValue): bigint | number => {
-  const [av, bv] = coerce_numeric(force_numeric(a), force_numeric(b));
-  return (av as any) - (bv as any);
-};
+export const sub =
+  (a: NixValue) =>
+  (b: NixValue): bigint | number => {
+    const [av, bv] = coerce_numeric(force_numeric(a), force_numeric(b));
+    return (av as any) - (bv as any);
+  };
 
-export const mul = (a: NixValue) => (b: NixValue): bigint | number => {
-  const [av, bv] = coerce_numeric(force_numeric(a), force_numeric(b));
-  return (av as any) * (bv as any);
-};
+export const mul =
+  (a: NixValue) =>
+  (b: NixValue): bigint | number => {
+    const [av, bv] = coerce_numeric(force_numeric(a), force_numeric(b));
+    return (av as any) * (bv as any);
+  };
 
-export const div = (a: NixValue) => (b: NixValue): NixNumber => {
-  const [av, bv] = coerce_numeric(force_numeric(a), force_numeric(b));
+export const div =
+  (a: NixValue) =>
+  (b: NixValue): NixNumber => {
+    const [av, bv] = coerce_numeric(force_numeric(a), force_numeric(b));
 
-  if (bv === 0 || bv === 0n) {
-    throw new RangeError('Division by zero');
-  }
+    if (bv === 0 || bv === 0n) {
+      throw new RangeError("Division by zero");
+    }
 
-  return (av as any) / (bv as any)
-};
+    return (av as any) / (bv as any);
+  };
 
 // Bitwise operations - only for integers
-export const bitAnd = (a: NixValue) => (b: NixValue): NixInt => {
-  const av = force_int(a);
-  const bv = force_int(b);
-  return av & bv;
-};
+export const bitAnd =
+  (a: NixValue) =>
+  (b: NixValue): NixInt => {
+    const av = force_int(a);
+    const bv = force_int(b);
+    return av & bv;
+  };
 
-export const bitOr = (a: NixValue) => (b: NixValue): NixInt => {
-  const av = force_int(a);
-  const bv = force_int(b);
-  return av | bv;
-};
+export const bitOr =
+  (a: NixValue) =>
+  (b: NixValue): NixInt => {
+    const av = force_int(a);
+    const bv = force_int(b);
+    return av | bv;
+  };
 
-export const bitXor = (a: NixValue) => (b: NixValue): NixInt => {
-  const av = force_int(a);
-  const bv = force_int(b);
-  return av ^ bv;
-};
+export const bitXor =
+  (a: NixValue) =>
+  (b: NixValue): NixInt => {
+    const av = force_int(a);
+    const bv = force_int(b);
+    return av ^ bv;
+  };
 
-export const lessThan = (a: NixValue) => (b: NixValue): NixBool =>
-  force_numeric(a) < force_numeric(b);
+export const lessThan =
+  (a: NixValue) =>
+  (b: NixValue): NixBool =>
+    force_numeric(a) < force_numeric(b);
diff --git a/nix-js/runtime-ts/src/builtins/attrs.ts b/nix-js/runtime-ts/src/builtins/attrs.ts
index dcdc55c..3641890 100644
--- a/nix-js/runtime-ts/src/builtins/attrs.ts
+++ b/nix-js/runtime-ts/src/builtins/attrs.ts
@@ -2,28 +2,34 @@
  * Attribute set operation builtin functions
  */
 
-import type { NixValue, NixAttrs, NixList } from '../types';
-import { force_attrs, force_string, force_function, force_list } from '../type-assert';
+import type { NixValue, NixAttrs, NixList } from "../types";
+import { force_attrs, force_string, force_function, force_list } from "../type-assert";
 
 export const attrNames = (set: NixValue): string[] => Object.keys(force_attrs(set));
 
 export const attrValues = (set: NixValue): NixValue[] => Object.values(force_attrs(set));
 
-export const getAttr = (s: NixValue) => (set: NixValue): NixValue =>
-  force_attrs(set)[force_string(s)];
+export const getAttr =
+  (s: NixValue) =>
+  (set: NixValue): NixValue =>
+    force_attrs(set)[force_string(s)];
 
-export const hasAttr = (s: NixValue) => (set: NixValue): boolean =>
-  Object.prototype.hasOwnProperty.call(force_attrs(set), force_string(s));
+export const hasAttr =
+  (s: NixValue) =>
+  (set: NixValue): boolean =>
+    Object.prototype.hasOwnProperty.call(force_attrs(set), force_string(s));
 
-export const mapAttrs = (f: NixValue) => (attrs: NixValue): NixAttrs => {
-  const new_attrs: NixAttrs = {};
-  const forced_attrs = force_attrs(attrs);
-  const forced_f = force_function(f);
-  for (const key in forced_attrs) {
-    new_attrs[key] = forced_f(key)(forced_attrs[key]);
-  }
-  return new_attrs;
-};
+export const mapAttrs =
+  (f: NixValue) =>
+  (attrs: NixValue): NixAttrs => {
+    const new_attrs: NixAttrs = {};
+    const forced_attrs = force_attrs(attrs);
+    const forced_f = force_function(f);
+    for (const key in forced_attrs) {
+      new_attrs[key] = forced_f(key)(forced_attrs[key]);
+    }
+    return new_attrs;
+  };
 
 export const listToAttrs = (e: NixValue): NixAttrs => {
   const attrs: NixAttrs = {};
@@ -35,33 +41,39 @@ export const listToAttrs = (e: NixValue): NixAttrs => {
   return attrs;
 };
 
-export const intersectAttrs = (e1: NixValue) => (e2: NixValue): NixAttrs => {
-  const f1 = force_attrs(e1);
-  const f2 = force_attrs(e2);
-  const attrs: NixAttrs = {};
-  for (const key of Object.keys(f2)) {
-    if (Object.prototype.hasOwnProperty.call(f1, key)) {
-      attrs[key] = f2[key];
+export const intersectAttrs =
+  (e1: NixValue) =>
+  (e2: NixValue): NixAttrs => {
+    const f1 = force_attrs(e1);
+    const f2 = force_attrs(e2);
+    const attrs: NixAttrs = {};
+    for (const key of Object.keys(f2)) {
+      if (Object.prototype.hasOwnProperty.call(f1, key)) {
+        attrs[key] = f2[key];
+      }
     }
-  }
-  return attrs;
-};
+    return attrs;
+  };
 
-export const catAttrs = (attr: NixValue) => (list: NixValue): NixList => {
-  const key = force_string(attr);
-  return force_list(list)
-    .map((set) => force_attrs(set)[key])
-    .filter((val) => val !== undefined);
-};
+export const catAttrs =
+  (attr: NixValue) =>
+  (list: NixValue): NixList => {
+    const key = force_string(attr);
+    return force_list(list)
+      .map((set) => force_attrs(set)[key])
+      .filter((val) => val !== undefined);
+  };
 
-export const groupBy = (f: NixValue) => (list: NixValue): NixAttrs => {
-  const attrs: NixAttrs = {};
-  const forced_f = force_function(f);
-  const forced_list = force_list(list);
-  for (const elem of forced_list) {
-    const key = force_string(forced_f(elem));
-    if (!attrs[key]) attrs[key] = [];
-    (attrs[key] as NixList).push(elem);
-  }
-  return attrs;
-};
+export const groupBy =
+  (f: NixValue) =>
+  (list: NixValue): NixAttrs => {
+    const attrs: NixAttrs = {};
+    const forced_f = force_function(f);
+    const forced_list = force_list(list);
+    for (const elem of forced_list) {
+      const key = force_string(forced_f(elem));
+      if (!attrs[key]) attrs[key] = [];
+      (attrs[key] as NixList).push(elem);
+    }
+    return attrs;
+  };
diff --git a/nix-js/runtime-ts/src/builtins/conversion.ts b/nix-js/runtime-ts/src/builtins/conversion.ts
index d7e8664..8a33883 100644
--- a/nix-js/runtime-ts/src/builtins/conversion.ts
+++ b/nix-js/runtime-ts/src/builtins/conversion.ts
@@ -2,24 +2,24 @@
  * Conversion and serialization builtin functions (unimplemented)
  */
 
-import type { NixValue } from '../types';
+import type { NixValue } from "../types";
 
 export const fromJSON = (e: NixValue): never => {
-  throw 'Not implemented: fromJSON';
+  throw "Not implemented: fromJSON";
 };
 
 export const fromTOML = (e: NixValue): never => {
-  throw 'Not implemented: fromTOML';
+  throw "Not implemented: fromTOML";
 };
 
 export const toJSON = (e: NixValue): never => {
-  throw 'Not implemented: toJSON';
+  throw "Not implemented: toJSON";
 };
 
 export const toXML = (e: NixValue): never => {
-  throw 'Not implemented: toXML';
+  throw "Not implemented: toXML";
 };
 
 export const toString = (name: NixValue, s: NixValue): never => {
-  throw 'Not implemented: toString';
+  throw "Not implemented: toString";
 };
diff --git a/nix-js/runtime-ts/src/builtins/functional.ts b/nix-js/runtime-ts/src/builtins/functional.ts
index 5983938..aeadcdb 100644
--- a/nix-js/runtime-ts/src/builtins/functional.ts
+++ b/nix-js/runtime-ts/src/builtins/functional.ts
@@ -2,17 +2,21 @@
  * Functional programming builtin functions
  */
 
-import type { NixValue } from '../types';
-import { force } from '../thunk';
+import type { NixValue } from "../types";
+import { force } from "../thunk";
 
-export const seq = (e1: NixValue) => (e2: NixValue): NixValue => {
-  force(e1); // Force evaluation of e1
-  return e2;
-};
+export const seq =
+  (e1: NixValue) =>
+  (e2: NixValue): NixValue => {
+    force(e1); // Force evaluation of e1
+    return e2;
+  };
 
-export const deepSeq = (e1: NixValue) => (e2: NixValue): never => {
-  throw 'Not implemented: deepSeq';
-};
+export const deepSeq =
+  (e1: NixValue) =>
+  (e2: NixValue): never => {
+    throw "Not implemented: deepSeq";
+  };
 
 export const abort = (s: NixValue): never => {
   throw `evaluation aborted with the following error message: '${force(s)}'`;
@@ -27,9 +31,11 @@ export const trace = (e1: NixValue, e2: NixValue): NixValue => {
   return e2;
 };
 
-export const warn = (e1: NixValue) => (e2: NixValue): NixValue => {
-  console.log(`evaluation warning: ${force(e1)}`);
-  return e2;
-};
+export const warn =
+  (e1: NixValue) =>
+  (e2: NixValue): NixValue => {
+    console.log(`evaluation warning: ${force(e1)}`);
+    return e2;
+  };
 
 export const breakFunc = (v: NixValue): NixValue => v;
diff --git a/nix-js/runtime-ts/src/builtins/index.ts b/nix-js/runtime-ts/src/builtins/index.ts
index 7fcf7ae..31c233d 100644
--- a/nix-js/runtime-ts/src/builtins/index.ts
+++ b/nix-js/runtime-ts/src/builtins/index.ts
@@ -3,13 +3,13 @@
  * Combines all builtin function categories into the global `builtins` object
  */
 
-import { create_thunk } from '../thunk';
+import { create_thunk } from "../thunk";
 
 /**
  * Symbol used to mark functions as primops (primitive operations)
  * This is similar to IS_THUNK but for builtin functions
  */
-export const IS_PRIMOP = Symbol('is_primop');
+export const IS_PRIMOP = Symbol("is_primop");
 
 /**
  * Metadata interface for primop functions
@@ -37,7 +37,7 @@ export const markPrimop = <T extends Function>(
   func: T,
   name: string,
   arity: number,
-  applied: number = 0
+  applied: number = 0,
 ): T => {
   // Mark this function as a primop
   (func as any)[IS_PRIMOP] = {
@@ -52,7 +52,7 @@ export const markPrimop = <T extends Function>(
     const wrappedFunc = ((...args: any[]) => {
       const result = func(...args);
       // If result is a function, mark it as the next layer
-      if (typeof result === 'function') {
+      if (typeof result === "function") {
         return markPrimop(result, name, arity, applied + args.length);
       }
       return result;
@@ -78,9 +78,9 @@ export const markPrimop = <T extends Function>(
  */
 export const is_primop = (value: unknown): value is Function & { [IS_PRIMOP]: PrimopMetadata } => {
   return (
-    typeof value === 'function' &&
+    typeof value === "function" &&
     IS_PRIMOP in value &&
-    typeof value[IS_PRIMOP] === 'object' &&
+    typeof value[IS_PRIMOP] === "object" &&
     value[IS_PRIMOP] !== null
   );
 };
@@ -98,16 +98,16 @@ export const get_primop_metadata = (func: unknown): PrimopMetadata | undefined =
 };
 
 // Import all builtin categories
-import * as arithmetic from './arithmetic';
-import * as math from './math';
-import * as typeCheck from './type-check';
-import * as list from './list';
-import * as attrs from './attrs';
-import * as string from './string';
-import * as functional from './functional';
-import * as io from './io';
-import * as conversion from './conversion';
-import * as misc from './misc';
+import * as arithmetic from "./arithmetic";
+import * as math from "./math";
+import * as typeCheck from "./type-check";
+import * as list from "./list";
+import * as attrs from "./attrs";
+import * as string from "./string";
+import * as functional from "./functional";
+import * as io from "./io";
+import * as conversion from "./conversion";
+import * as misc from "./misc";
 
 /**
  * The global builtins object
@@ -120,122 +120,126 @@ import * as misc from './misc';
  * All primop functions are marked with IS_PRIMOP symbol for runtime introspection
  */
 export const builtins: any = {
-  add: markPrimop(arithmetic.add, 'add', 2),
-  sub: markPrimop(arithmetic.sub, 'sub', 2),
-  mul: markPrimop(arithmetic.mul, 'mul', 2),
-  div: markPrimop(arithmetic.div, 'div', 2),
-  bitAnd: markPrimop(arithmetic.bitAnd, 'bitAnd', 2),
-  bitOr: markPrimop(arithmetic.bitOr, 'bitOr', 2),
-  bitXor: markPrimop(arithmetic.bitXor, 'bitXor', 2),
-  lessThan: markPrimop(arithmetic.lessThan, 'lessThan', 2),
+  add: markPrimop(arithmetic.add, "add", 2),
+  sub: markPrimop(arithmetic.sub, "sub", 2),
+  mul: markPrimop(arithmetic.mul, "mul", 2),
+  div: markPrimop(arithmetic.div, "div", 2),
+  bitAnd: markPrimop(arithmetic.bitAnd, "bitAnd", 2),
+  bitOr: markPrimop(arithmetic.bitOr, "bitOr", 2),
+  bitXor: markPrimop(arithmetic.bitXor, "bitXor", 2),
+  lessThan: markPrimop(arithmetic.lessThan, "lessThan", 2),
 
-  ceil: markPrimop(math.ceil, 'ceil', 1),
-  floor: markPrimop(math.floor, 'floor', 1),
+  ceil: markPrimop(math.ceil, "ceil", 1),
+  floor: markPrimop(math.floor, "floor", 1),
 
-  isAttrs: markPrimop(typeCheck.isAttrs, 'isAttrs', 1),
-  isBool: markPrimop(typeCheck.isBool, 'isBool', 1),
-  isFloat: markPrimop(typeCheck.isFloat, 'isFloat', 1),
-  isFunction: markPrimop(typeCheck.isFunction, 'isFunction', 1),
-  isInt: markPrimop(typeCheck.isInt, 'isInt', 1),
-  isList: markPrimop(typeCheck.isList, 'isList', 1),
-  isNull: markPrimop(typeCheck.isNull, 'isNull', 1),
-  isPath: markPrimop(typeCheck.isPath, 'isPath', 1),
-  isString: markPrimop(typeCheck.isString, 'isString', 1),
-  typeOf: markPrimop(typeCheck.typeOf, 'typeOf', 1),
+  isAttrs: markPrimop(typeCheck.isAttrs, "isAttrs", 1),
+  isBool: markPrimop(typeCheck.isBool, "isBool", 1),
+  isFloat: markPrimop(typeCheck.isFloat, "isFloat", 1),
+  isFunction: markPrimop(typeCheck.isFunction, "isFunction", 1),
+  isInt: markPrimop(typeCheck.isInt, "isInt", 1),
+  isList: markPrimop(typeCheck.isList, "isList", 1),
+  isNull: markPrimop(typeCheck.isNull, "isNull", 1),
+  isPath: markPrimop(typeCheck.isPath, "isPath", 1),
+  isString: markPrimop(typeCheck.isString, "isString", 1),
+  typeOf: markPrimop(typeCheck.typeOf, "typeOf", 1),
 
-  map: markPrimop(list.map, 'map', 2),
-  filter: markPrimop(list.filter, 'filter', 2),
-  length: markPrimop(list.length, 'length', 1),
-  head: markPrimop(list.head, 'head', 1),
-  tail: markPrimop(list.tail, 'tail', 1),
-  elem: markPrimop(list.elem, 'elem', 2),
-  elemAt: markPrimop(list.elemAt, 'elemAt', 2),
-  concatLists: markPrimop(list.concatLists, 'concatLists', 1),
-  concatMap: markPrimop(list.concatMap, 'concatMap', 2),
-  'foldl\'': markPrimop(list.foldlPrime, 'foldl\'', 3),
-  sort: markPrimop(list.sort, 'sort', 2),
-  partition: markPrimop(list.partition, 'partition', 2),
-  genList: markPrimop(list.genList, 'genList', 2),
-  all: markPrimop(list.all, 'all', 2),
-  any: markPrimop(list.any, 'any', 2),
+  map: markPrimop(list.map, "map", 2),
+  filter: markPrimop(list.filter, "filter", 2),
+  length: markPrimop(list.length, "length", 1),
+  head: markPrimop(list.head, "head", 1),
+  tail: markPrimop(list.tail, "tail", 1),
+  elem: markPrimop(list.elem, "elem", 2),
+  elemAt: markPrimop(list.elemAt, "elemAt", 2),
+  concatLists: markPrimop(list.concatLists, "concatLists", 1),
+  concatMap: markPrimop(list.concatMap, "concatMap", 2),
+  "foldl'": markPrimop(list.foldlPrime, "foldl'", 3),
+  sort: markPrimop(list.sort, "sort", 2),
+  partition: markPrimop(list.partition, "partition", 2),
+  genList: markPrimop(list.genList, "genList", 2),
+  all: markPrimop(list.all, "all", 2),
+  any: markPrimop(list.any, "any", 2),
 
-  attrNames: markPrimop(attrs.attrNames, 'attrNames', 1),
-  attrValues: markPrimop(attrs.attrValues, 'attrValues', 1),
-  getAttr: markPrimop(attrs.getAttr, 'getAttr', 2),
-  hasAttr: markPrimop(attrs.hasAttr, 'hasAttr', 2),
-  mapAttrs: markPrimop(attrs.mapAttrs, 'mapAttrs', 2),
-  listToAttrs: markPrimop(attrs.listToAttrs, 'listToAttrs', 1),
-  intersectAttrs: markPrimop(attrs.intersectAttrs, 'intersectAttrs', 2),
-  catAttrs: markPrimop(attrs.catAttrs, 'catAttrs', 2),
-  groupBy: markPrimop(attrs.groupBy, 'groupBy', 2),
+  attrNames: markPrimop(attrs.attrNames, "attrNames", 1),
+  attrValues: markPrimop(attrs.attrValues, "attrValues", 1),
+  getAttr: markPrimop(attrs.getAttr, "getAttr", 2),
+  hasAttr: markPrimop(attrs.hasAttr, "hasAttr", 2),
+  mapAttrs: markPrimop(attrs.mapAttrs, "mapAttrs", 2),
+  listToAttrs: markPrimop(attrs.listToAttrs, "listToAttrs", 1),
+  intersectAttrs: markPrimop(attrs.intersectAttrs, "intersectAttrs", 2),
+  catAttrs: markPrimop(attrs.catAttrs, "catAttrs", 2),
+  groupBy: markPrimop(attrs.groupBy, "groupBy", 2),
 
-  stringLength: markPrimop(string.stringLength, 'stringLength', 1),
-  substring: markPrimop(string.substring, 'substring', 3),
-  concatStringsSep: markPrimop(string.concatStringsSep, 'concatStringsSep', 2),
-  baseNameOf: markPrimop(string.baseNameOf, 'baseNameOf', 1),
+  stringLength: markPrimop(string.stringLength, "stringLength", 1),
+  substring: markPrimop(string.substring, "substring", 3),
+  concatStringsSep: markPrimop(string.concatStringsSep, "concatStringsSep", 2),
+  baseNameOf: markPrimop(string.baseNameOf, "baseNameOf", 1),
 
-  seq: markPrimop(functional.seq, 'seq', 2),
-  deepSeq: markPrimop(functional.deepSeq, 'deepSeq', 2),
-  abort: markPrimop(functional.abort, 'abort', 1),
-  throw: markPrimop(functional.throwFunc, 'throw', 1),
-  trace: markPrimop(functional.trace, 'trace', 2),
-  warn: markPrimop(functional.warn, 'warn', 2),
-  break: markPrimop(functional.breakFunc, 'break', 1),
+  seq: markPrimop(functional.seq, "seq", 2),
+  deepSeq: markPrimop(functional.deepSeq, "deepSeq", 2),
+  abort: markPrimop(functional.abort, "abort", 1),
+  throw: markPrimop(functional.throwFunc, "throw", 1),
+  trace: markPrimop(functional.trace, "trace", 2),
+  warn: markPrimop(functional.warn, "warn", 2),
+  break: markPrimop(functional.breakFunc, "break", 1),
 
-  import: markPrimop(io.importFunc, 'import', 1),
-  scopedImport: markPrimop(io.scopedImport, 'scopedImport', 2),
-  fetchClosure: markPrimop(io.fetchClosure, 'fetchClosure', 1),
-  fetchGit: markPrimop(io.fetchGit, 'fetchGit', 1),
-  fetchTarball: markPrimop(io.fetchTarball, 'fetchTarball', 1),
-  fetchTree: markPrimop(io.fetchTree, 'fetchTree', 1),
-  fetchurl: markPrimop(io.fetchurl, 'fetchurl', 1),
-  readDir: markPrimop(io.readDir, 'readDir', 1),
-  readFile: markPrimop(io.readFile, 'readFile', 1),
-  readFileType: markPrimop(io.readFileType, 'readFileType', 1),
-  pathExists: markPrimop(io.pathExists, 'pathExists', 1),
-  path: markPrimop(io.path, 'path', 1),
-  toFile: markPrimop(io.toFile, 'toFile', 2),
-  toPath: markPrimop(io.toPath, 'toPath', 1),
-  filterSource: markPrimop(io.filterSource, 'filterSource', 2),
-  findFile: markPrimop(io.findFile, 'findFile', 2),
-  getEnv: markPrimop(io.getEnv, 'getEnv', 1),
+  import: markPrimop(io.importFunc, "import", 1),
+  scopedImport: markPrimop(io.scopedImport, "scopedImport", 2),
+  fetchClosure: markPrimop(io.fetchClosure, "fetchClosure", 1),
+  fetchGit: markPrimop(io.fetchGit, "fetchGit", 1),
+  fetchTarball: markPrimop(io.fetchTarball, "fetchTarball", 1),
+  fetchTree: markPrimop(io.fetchTree, "fetchTree", 1),
+  fetchurl: markPrimop(io.fetchurl, "fetchurl", 1),
+  readDir: markPrimop(io.readDir, "readDir", 1),
+  readFile: markPrimop(io.readFile, "readFile", 1),
+  readFileType: markPrimop(io.readFileType, "readFileType", 1),
+  pathExists: markPrimop(io.pathExists, "pathExists", 1),
+  path: markPrimop(io.path, "path", 1),
+  toFile: markPrimop(io.toFile, "toFile", 2),
+  toPath: markPrimop(io.toPath, "toPath", 1),
+  filterSource: markPrimop(io.filterSource, "filterSource", 2),
+  findFile: markPrimop(io.findFile, "findFile", 2),
+  getEnv: markPrimop(io.getEnv, "getEnv", 1),
 
-  fromJSON: markPrimop(conversion.fromJSON, 'fromJSON', 1),
-  fromTOML: markPrimop(conversion.fromTOML, 'fromTOML', 1),
-  toJSON: markPrimop(conversion.toJSON, 'toJSON', 1),
-  toXML: markPrimop(conversion.toXML, 'toXML', 1),
-  toString: markPrimop(conversion.toString, 'toString', 1),
+  fromJSON: markPrimop(conversion.fromJSON, "fromJSON", 1),
+  fromTOML: markPrimop(conversion.fromTOML, "fromTOML", 1),
+  toJSON: markPrimop(conversion.toJSON, "toJSON", 1),
+  toXML: markPrimop(conversion.toXML, "toXML", 1),
+  toString: markPrimop(conversion.toString, "toString", 1),
 
-  getContext: markPrimop(misc.getContext, 'getContext', 1),
-  hasContext: markPrimop(misc.hasContext, 'hasContext', 1),
-  hashFile: markPrimop(misc.hashFile, 'hashFile', 2),
-  hashString: markPrimop(misc.hashString, 'hashString', 2),
-  convertHash: markPrimop(misc.convertHash, 'convertHash', 2),
-  unsafeDiscardOutputDependency: markPrimop(misc.unsafeDiscardOutputDependency, 'unsafeDiscardOutputDependency', 1),
-  unsafeDiscardStringContext: markPrimop(misc.unsafeDiscardStringContext, 'unsafeDiscardStringContext', 1),
-  unsafeGetAttrPos: markPrimop(misc.unsafeGetAttrPos, 'unsafeGetAttrPos', 2),
-  addDrvOutputDependencies: markPrimop(misc.addDrvOutputDependencies, 'addDrvOutputDependencies', 2),
-  compareVersions: markPrimop(misc.compareVersions, 'compareVersions', 2),
-  dirOf: markPrimop(misc.dirOf, 'dirOf', 1),
-  flakeRefToString: markPrimop(misc.flakeRefToString, 'flakeRefToString', 1),
-  functionArgs: markPrimop(misc.functionArgs, 'functionArgs', 1),
-  genericClosure: markPrimop(misc.genericClosure, 'genericClosure', 1),
-  getFlake: markPrimop(misc.getFlake, 'getFlake', 1),
-  match: markPrimop(misc.match, 'match', 2),
-  outputOf: markPrimop(misc.outputOf, 'outputOf', 2),
-  parseDrvName: markPrimop(misc.parseDrvName, 'parseDrvName', 1),
-  parseFlakeName: markPrimop(misc.parseFlakeName, 'parseFlakeName', 1),
-  placeholder: markPrimop(misc.placeholder, 'placeholder', 1),
-  replaceStrings: markPrimop(misc.replaceStrings, 'replaceStrings', 3),
-  split: markPrimop(misc.split, 'split', 2),
-  splitVersion: markPrimop(misc.splitVersion, 'splitVersion', 1),
-  traceVerbose: markPrimop(misc.traceVerbose, 'traceVerbose', 2),
-  tryEval: markPrimop(misc.tryEval, 'tryEval', 1),
-  zipAttrsWith: markPrimop(misc.zipAttrsWith, 'zipAttrsWith', 2),
+  getContext: markPrimop(misc.getContext, "getContext", 1),
+  hasContext: markPrimop(misc.hasContext, "hasContext", 1),
+  hashFile: markPrimop(misc.hashFile, "hashFile", 2),
+  hashString: markPrimop(misc.hashString, "hashString", 2),
+  convertHash: markPrimop(misc.convertHash, "convertHash", 2),
+  unsafeDiscardOutputDependency: markPrimop(
+    misc.unsafeDiscardOutputDependency,
+    "unsafeDiscardOutputDependency",
+    1,
+  ),
+  unsafeDiscardStringContext: markPrimop(misc.unsafeDiscardStringContext, "unsafeDiscardStringContext", 1),
+  unsafeGetAttrPos: markPrimop(misc.unsafeGetAttrPos, "unsafeGetAttrPos", 2),
+  addDrvOutputDependencies: markPrimop(misc.addDrvOutputDependencies, "addDrvOutputDependencies", 2),
+  compareVersions: markPrimop(misc.compareVersions, "compareVersions", 2),
+  dirOf: markPrimop(misc.dirOf, "dirOf", 1),
+  flakeRefToString: markPrimop(misc.flakeRefToString, "flakeRefToString", 1),
+  functionArgs: markPrimop(misc.functionArgs, "functionArgs", 1),
+  genericClosure: markPrimop(misc.genericClosure, "genericClosure", 1),
+  getFlake: markPrimop(misc.getFlake, "getFlake", 1),
+  match: markPrimop(misc.match, "match", 2),
+  outputOf: markPrimop(misc.outputOf, "outputOf", 2),
+  parseDrvName: markPrimop(misc.parseDrvName, "parseDrvName", 1),
+  parseFlakeName: markPrimop(misc.parseFlakeName, "parseFlakeName", 1),
+  placeholder: markPrimop(misc.placeholder, "placeholder", 1),
+  replaceStrings: markPrimop(misc.replaceStrings, "replaceStrings", 3),
+  split: markPrimop(misc.split, "split", 2),
+  splitVersion: markPrimop(misc.splitVersion, "splitVersion", 1),
+  traceVerbose: markPrimop(misc.traceVerbose, "traceVerbose", 2),
+  tryEval: markPrimop(misc.tryEval, "tryEval", 1),
+  zipAttrsWith: markPrimop(misc.zipAttrsWith, "zipAttrsWith", 2),
 
   builtins: create_thunk(() => builtins),
   currentSystem: create_thunk(() => {
-    throw 'Not implemented: currentSystem';
+    throw "Not implemented: currentSystem";
   }),
   currentTime: create_thunk(() => Date.now()),
 
@@ -245,6 +249,6 @@ export const builtins: any = {
 
   langVersion: 6,
   nixPath: [],
-  nixVersion: 'NIX_JS_VERSION',
-  storeDir: '/nix/store',
+  nixVersion: "NIX_JS_VERSION",
+  storeDir: "/nix/store",
 };
diff --git a/nix-js/runtime-ts/src/builtins/io.ts b/nix-js/runtime-ts/src/builtins/io.ts
index 571b2cf..c157585 100644
--- a/nix-js/runtime-ts/src/builtins/io.ts
+++ b/nix-js/runtime-ts/src/builtins/io.ts
@@ -3,72 +3,76 @@
  * These functions require Node.js/Deno APIs not available in V8
  */
 
-import type { NixValue } from '../types';
+import type { NixValue } from "../types";
 
 export const importFunc = (path: NixValue): never => {
-  throw 'Not implemented: import';
+  throw "Not implemented: import";
 };
 
-export const scopedImport = (scope: NixValue) => (path: NixValue): never => {
-  throw 'Not implemented: scopedImport';
-};
+export const scopedImport =
+  (scope: NixValue) =>
+  (path: NixValue): never => {
+    throw "Not implemented: scopedImport";
+  };
 
 export const fetchClosure = (args: NixValue): never => {
-  throw 'Not implemented: fetchClosure';
+  throw "Not implemented: fetchClosure";
 };
 
 export const fetchGit = (args: NixValue): never => {
-  throw 'Not implemented: fetchGit';
+  throw "Not implemented: fetchGit";
 };
 
 export const fetchTarball = (args: NixValue): never => {
-  throw 'Not implemented: fetchTarball';
+  throw "Not implemented: fetchTarball";
 };
 
 export const fetchTree = (args: NixValue): never => {
-  throw 'Not implemented: fetchTree';
+  throw "Not implemented: fetchTree";
 };
 
 export const fetchurl = (args: NixValue): never => {
-  throw 'Not implemented: fetchurl';
+  throw "Not implemented: fetchurl";
 };
 
 export const readDir = (path: NixValue): never => {
-  throw 'Not implemented: readDir';
+  throw "Not implemented: readDir";
 };
 
 export const readFile = (path: NixValue): never => {
-  throw 'Not implemented: readFile';
+  throw "Not implemented: readFile";
 };
 
 export const readFileType = (path: NixValue): never => {
-  throw 'Not implemented: readFileType';
+  throw "Not implemented: readFileType";
 };
 
 export const pathExists = (path: NixValue): never => {
-  throw 'Not implemented: pathExists';
+  throw "Not implemented: pathExists";
 };
 
 export const path = (args: NixValue): never => {
-  throw 'Not implemented: path';
+  throw "Not implemented: path";
 };
 
 export const toFile = (name: NixValue, s: NixValue): never => {
-  throw 'Not implemented: toFile';
+  throw "Not implemented: toFile";
 };
 
 export const toPath = (name: NixValue, s: NixValue): never => {
-  throw 'Not implemented: toPath';
+  throw "Not implemented: toPath";
 };
 
 export const filterSource = (args: NixValue): never => {
-  throw 'Not implemented: filterSource';
+  throw "Not implemented: filterSource";
 };
 
-export const findFile = (search: NixValue) => (lookup: NixValue): never => {
-  throw 'Not implemented: findFile';
-};
+export const findFile =
+  (search: NixValue) =>
+  (lookup: NixValue): never => {
+    throw "Not implemented: findFile";
+  };
 
 export const getEnv = (s: NixValue): never => {
-  throw 'Not implemented: getEnv';
+  throw "Not implemented: getEnv";
 };
diff --git a/nix-js/runtime-ts/src/builtins/list.ts b/nix-js/runtime-ts/src/builtins/list.ts
index 76f85d1..94f269a 100644
--- a/nix-js/runtime-ts/src/builtins/list.ts
+++ b/nix-js/runtime-ts/src/builtins/list.ts
@@ -3,19 +3,23 @@
  * All functions are properly curried
  */
 
-import type { NixValue, NixList, NixAttrs } from '../types';
-import { force } from '../thunk';
-import { force_list, force_function, force_numeric, force_int } from '../type-assert';
+import type { NixValue, NixList, NixAttrs } from "../types";
+import { force } from "../thunk";
+import { force_list, force_function, force_numeric, force_int } from "../type-assert";
 
-export const map = (f: NixValue) => (list: NixValue): NixList =>
-  force_list(list).map(force_function(f));
+export const map =
+  (f: NixValue) =>
+  (list: NixValue): NixList =>
+    force_list(list).map(force_function(f));
 
-export const filter = (f: NixValue) => (list: NixValue): NixList =>
-  force_list(list).filter(force_function(f));
+export const filter =
+  (f: NixValue) =>
+  (list: NixValue): NixList =>
+    force_list(list).filter(force_function(f));
 
 export const length = (e: NixValue): bigint => {
   const forced = force(e);
-  if (typeof forced === 'string') return BigInt(forced.length);
+  if (typeof forced === "string") return BigInt(forced.length);
   return BigInt(force_list(forced).length);
 };
 
@@ -23,19 +27,23 @@ export const head = (list: NixValue): NixValue => force_list(list)[0];
 
 export const tail = (list: NixValue): NixList => force_list(list).slice(1);
 
-export const elem = (x: NixValue) => (xs: NixValue): boolean =>
-  force_list(xs).includes(force(x));
+export const elem =
+  (x: NixValue) =>
+  (xs: NixValue): boolean =>
+    force_list(xs).includes(force(x));
 
-export const elemAt = (xs: NixValue) => (n: NixValue): NixValue => {
-  const list = force_list(xs);
-  const idx = Number(force_int(n));
+export const elemAt =
+  (xs: NixValue) =>
+  (n: NixValue): NixValue => {
+    const list = force_list(xs);
+    const idx = Number(force_int(n));
 
-  if (idx < 0 || idx >= list.length) {
-    throw new RangeError(`Index ${idx} out of bounds for list of length ${list.length}`);
-  }
+    if (idx < 0 || idx >= list.length) {
+      throw new RangeError(`Index ${idx} out of bounds for list of length ${list.length}`);
+    }
 
-  return list[idx];
-};
+    return list[idx];
+  };
 
 export const concatLists = (lists: NixValue): NixList => {
   return force_list(lists).reduce((acc: NixList, cur: NixValue) => {
@@ -43,60 +51,75 @@ export const concatLists = (lists: NixValue): NixList => {
   }, []);
 };
 
-export const concatMap = (f: NixValue) => (lists: NixValue): NixList => {
-  const fn = force_function(f);
-  return force_list(lists).reduce((acc: NixList, cur: NixValue) => {
-    return acc.concat(force(fn(cur)) as NixList);
-  }, []);
-};
-
-export const foldlPrime = (op_fn: NixValue) => (nul: NixValue) => (list: NixValue): NixValue => {
-  const forced_op = force_function(op_fn);
-  return force_list(list).reduce((acc: NixValue, cur: NixValue) => {
-    return forced_op(acc)(cur);
-  }, nul);
-};
-
-export const sort = (cmp: NixValue) => (list: NixValue): NixList => {
-  const forced_list = [...force_list(list)];
-  const forced_cmp = force_function(cmp);
-  return forced_list.sort((a, b) => {
-    if (force(forced_cmp(a)(b))) return -1;
-    if (force(forced_cmp(b)(a))) return 1;
-    return 0;
-  });
-};
-
-export const partition = (pred: NixValue) => (list: NixValue): NixAttrs => {
-  const forced_list = force_list(list);
-  const forced_pred = force_function(pred);
-  const attrs: NixAttrs = {
-    right: [],
-    wrong: [],
+export const concatMap =
+  (f: NixValue) =>
+  (lists: NixValue): NixList => {
+    const fn = force_function(f);
+    return force_list(lists).reduce((acc: NixList, cur: NixValue) => {
+      return acc.concat(force(fn(cur)) as NixList);
+    }, []);
   };
-  for (const elem of forced_list) {
-    if (force(forced_pred(elem))) {
-      (attrs.right as NixList).push(elem);
-    } else {
-      (attrs.wrong as NixList).push(elem);
+
+export const foldlPrime =
+  (op_fn: NixValue) =>
+  (nul: NixValue) =>
+  (list: NixValue): NixValue => {
+    const forced_op = force_function(op_fn);
+    return force_list(list).reduce((acc: NixValue, cur: NixValue) => {
+      return forced_op(acc)(cur);
+    }, nul);
+  };
+
+export const sort =
+  (cmp: NixValue) =>
+  (list: NixValue): NixList => {
+    const forced_list = [...force_list(list)];
+    const forced_cmp = force_function(cmp);
+    return forced_list.sort((a, b) => {
+      if (force(forced_cmp(a)(b))) return -1;
+      if (force(forced_cmp(b)(a))) return 1;
+      return 0;
+    });
+  };
+
+export const partition =
+  (pred: NixValue) =>
+  (list: NixValue): NixAttrs => {
+    const forced_list = force_list(list);
+    const forced_pred = force_function(pred);
+    const attrs: NixAttrs = {
+      right: [],
+      wrong: [],
+    };
+    for (const elem of forced_list) {
+      if (force(forced_pred(elem))) {
+        (attrs.right as NixList).push(elem);
+      } else {
+        (attrs.wrong as NixList).push(elem);
+      }
     }
-  }
-  return attrs;
-};
+    return attrs;
+  };
 
-export const genList = (f: NixValue) => (len: NixValue): NixList => {
-  const func = force_function(f);
-  const length = force_int(len);
+export const genList =
+  (f: NixValue) =>
+  (len: NixValue): NixList => {
+    const func = force_function(f);
+    const length = force_int(len);
 
-  if (length < 0) {
-    throw new TypeError(`genList length must be non-negative integer, got ${length}`);
-  }
+    if (length < 0) {
+      throw new TypeError(`genList length must be non-negative integer, got ${length}`);
+    }
 
-  return [...Array(Number(length)).keys()].map(i => func(BigInt(i)));
-};
+    return [...Array(Number(length)).keys()].map((i) => func(BigInt(i)));
+  };
 
-export const all = (pred: NixValue) => (list: NixValue): boolean =>
-  force_list(list).every(force_function(pred));
+export const all =
+  (pred: NixValue) =>
+  (list: NixValue): boolean =>
+    force_list(list).every(force_function(pred));
 
-export const any = (pred: NixValue) => (list: NixValue): boolean =>
-  force_list(list).some(force_function(pred));
+export const any =
+  (pred: NixValue) =>
+  (list: NixValue): boolean =>
+    force_list(list).some(force_function(pred));
diff --git a/nix-js/runtime-ts/src/builtins/math.ts b/nix-js/runtime-ts/src/builtins/math.ts
index de8e7a4..0c6e668 100644
--- a/nix-js/runtime-ts/src/builtins/math.ts
+++ b/nix-js/runtime-ts/src/builtins/math.ts
@@ -2,17 +2,17 @@
  * Math builtin functions
  */
 
-import type { NixValue } from '../types';
-import { force_numeric } from '../type-assert';
+import type { NixValue } from "../types";
+import { force_numeric } from "../type-assert";
 
 export const ceil = (x: NixValue): bigint => {
   const val = force_numeric(x);
-  if (typeof val === 'bigint') return val;  // Already an integer
-  return BigInt(Math.ceil(val));            // Convert to integer
+  if (typeof val === "bigint") return val; // Already an integer
+  return BigInt(Math.ceil(val)); // Convert to integer
 };
 
 export const floor = (x: NixValue): bigint => {
   const val = force_numeric(x);
-  if (typeof val === 'bigint') return val;  // Already an integer
-  return BigInt(Math.floor(val));           // Convert to integer
+  if (typeof val === "bigint") return val; // Already an integer
+  return BigInt(Math.floor(val)); // Convert to integer
 };
diff --git a/nix-js/runtime-ts/src/builtins/misc.ts b/nix-js/runtime-ts/src/builtins/misc.ts
index e2d857d..70bd76d 100644
--- a/nix-js/runtime-ts/src/builtins/misc.ts
+++ b/nix-js/runtime-ts/src/builtins/misc.ts
@@ -2,108 +2,125 @@
  * Miscellaneous unimplemented builtin functions
  */
 
-import type { NixValue } from '../types';
+import type { NixValue } from "../types";
 
 export const getContext = (s: NixValue): never => {
-  throw 'Not implemented: getContext';
+  throw "Not implemented: getContext";
 };
 
 export const hasContext = (s: NixValue): never => {
-  throw 'Not implemented: hasContext';
+  throw "Not implemented: hasContext";
 };
 
-export const hashFile = (type: NixValue) => (p: NixValue): never => {
-  throw 'Not implemented: hashFile';
-};
+export const hashFile =
+  (type: NixValue) =>
+  (p: NixValue): never => {
+    throw "Not implemented: hashFile";
+  };
 
-export const hashString = (type: NixValue) => (p: NixValue): never => {
-  throw 'Not implemented: hashString';
-};
+export const hashString =
+  (type: NixValue) =>
+  (p: NixValue): never => {
+    throw "Not implemented: hashString";
+  };
 
 export const convertHash = (args: NixValue): never => {
-  throw 'Not implemented: convertHash';
+  throw "Not implemented: convertHash";
 };
 
 export const unsafeDiscardOutputDependency = (s: NixValue): never => {
-  throw 'Not implemented: unsafeDiscardOutputDependency';
+  throw "Not implemented: unsafeDiscardOutputDependency";
 };
 
 export const unsafeDiscardStringContext = (s: NixValue): never => {
-  throw 'Not implemented: unsafeDiscardStringContext';
+  throw "Not implemented: unsafeDiscardStringContext";
 };
 
 export const unsafeGetAttrPos = (s: NixValue): never => {
-  throw 'Not implemented: unsafeGetAttrPos';
+  throw "Not implemented: unsafeGetAttrPos";
 };
 
 export const addDrvOutputDependencies = (s: NixValue): never => {
-  throw 'Not implemented: addDrvOutputDependencies';
+  throw "Not implemented: addDrvOutputDependencies";
 };
 
-export const compareVersions = (s1: NixValue) => (s2: NixValue): never => {
-  throw 'Not implemented: compareVersions';
-};
+export const compareVersions =
+  (s1: NixValue) =>
+  (s2: NixValue): never => {
+    throw "Not implemented: compareVersions";
+  };
 
 export const dirOf = (s: NixValue): never => {
-  throw 'Not implemented: dirOf';
+  throw "Not implemented: dirOf";
 };
 
 export const flakeRefToString = (attrs: NixValue): never => {
-  throw 'Not implemented: flakeRefToString';
+  throw "Not implemented: flakeRefToString";
 };
 
 export const functionArgs = (f: NixValue): never => {
-  throw 'Not implemented: functionArgs';
+  throw "Not implemented: functionArgs";
 };
 
 export const genericClosure = (args: NixValue): never => {
-  throw 'Not implemented: genericClosure';
+  throw "Not implemented: genericClosure";
 };
 
 export const getFlake = (attrs: NixValue): never => {
-  throw 'Not implemented: getFlake';
+  throw "Not implemented: getFlake";
 };
 
-export const match = (regex: NixValue) => (str: NixValue): never => {
-  throw 'Not implemented: match';
-};
+export const match =
+  (regex: NixValue) =>
+  (str: NixValue): never => {
+    throw "Not implemented: match";
+  };
 
-export const outputOf = (drv: NixValue) => (out: NixValue): never => {
-  throw 'Not implemented: outputOf';
-};
+export const outputOf =
+  (drv: NixValue) =>
+  (out: NixValue): never => {
+    throw "Not implemented: outputOf";
+  };
 
 export const parseDrvName = (s: NixValue): never => {
-  throw 'Not implemented: parseDrvName';
+  throw "Not implemented: parseDrvName";
 };
 
 export const parseFlakeName = (s: NixValue): never => {
-  throw 'Not implemented: parseFlakeName';
+  throw "Not implemented: parseFlakeName";
 };
 
 export const placeholder = (output: NixValue): never => {
-  throw 'Not implemented: placeholder';
+  throw "Not implemented: placeholder";
 };
 
-export const replaceStrings = (from: NixValue) => (to: NixValue) => (s: NixValue): never => {
-  throw 'Not implemented: replaceStrings';
-};
+export const replaceStrings =
+  (from: NixValue) =>
+  (to: NixValue) =>
+  (s: NixValue): never => {
+    throw "Not implemented: replaceStrings";
+  };
 
 export const split = (regex: NixValue, str: NixValue): never => {
-  throw 'Not implemented: split';
+  throw "Not implemented: split";
 };
 
 export const splitVersion = (s: NixValue): never => {
-  throw 'Not implemented: splitVersion';
+  throw "Not implemented: splitVersion";
 };
 
 export const traceVerbose = (e1: NixValue, e2: NixValue): never => {
-  throw 'Not implemented: traceVerbose';
+  throw "Not implemented: traceVerbose";
 };
 
-export const tryEval = (e1: NixValue) => (e2: NixValue): never => {
-  throw 'Not implemented: tryEval';
-};
+export const tryEval =
+  (e1: NixValue) =>
+  (e2: NixValue): never => {
+    throw "Not implemented: tryEval";
+  };
 
-export const zipAttrsWith = (f: NixValue) => (list: NixValue): never => {
-  throw 'Not implemented: zipAttrsWith';
-};
+export const zipAttrsWith =
+  (f: NixValue) =>
+  (list: NixValue): never => {
+    throw "Not implemented: zipAttrsWith";
+  };
diff --git a/nix-js/runtime-ts/src/builtins/string.ts b/nix-js/runtime-ts/src/builtins/string.ts
index ac6d9a1..e223cbb 100644
--- a/nix-js/runtime-ts/src/builtins/string.ts
+++ b/nix-js/runtime-ts/src/builtins/string.ts
@@ -2,32 +2,37 @@
  * String operation builtin functions
  */
 
-import type { NixValue } from '../types';
-import { force_string, force_list, force_int } from '../type-assert';
+import type { NixValue } from "../types";
+import { force_string, force_list, force_int } from "../type-assert";
 
 export const stringLength = (e: NixValue): number => force_string(e).length;
 
-export const substring = (start: NixValue) => (len: NixValue) => (s: NixValue): string => {
-  const str = force_string(s);
-  const startPos = Number(force_int(start));
-  const length = Number(force_int(len));
-  return str.substring(startPos, startPos + length);
-};
+export const substring =
+  (start: NixValue) =>
+  (len: NixValue) =>
+  (s: NixValue): string => {
+    const str = force_string(s);
+    const startPos = Number(force_int(start));
+    const length = Number(force_int(len));
+    return str.substring(startPos, startPos + length);
+  };
 
-export const concatStringsSep = (sep: NixValue) => (list: NixValue): string =>
-  force_list(list).join(force_string(sep));
+export const concatStringsSep =
+  (sep: NixValue) =>
+  (list: NixValue): string =>
+    force_list(list).join(force_string(sep));
 
 export const baseNameOf = (x: NixValue): string => {
   const str = force_string(x);
-  if (str.length === 0) return '';
+  if (str.length === 0) return "";
 
   let last = str.length - 1;
-  if (str[last] === '/' && last > 0) last -= 1;
+  if (str[last] === "/" && last > 0) last -= 1;
 
   let pos = last;
-  while (pos >= 0 && str[pos] !== '/') pos -= 1;
+  while (pos >= 0 && str[pos] !== "/") pos -= 1;
 
-  if (pos !== 0 || (pos === 0 && str[pos] === '/')) {
+  if (pos !== 0 || (pos === 0 && str[pos] === "/")) {
     pos += 1;
   }
 
diff --git a/nix-js/runtime-ts/src/builtins/type-check.ts b/nix-js/runtime-ts/src/builtins/type-check.ts
index f9ff4f3..943e97c 100644
--- a/nix-js/runtime-ts/src/builtins/type-check.ts
+++ b/nix-js/runtime-ts/src/builtins/type-check.ts
@@ -2,26 +2,36 @@
  * Type checking builtin functions
  */
 
-import type { NixAttrs, NixBool, NixFloat, NixFunction, NixInt, NixList, NixNull, NixString, NixValue } from '../types';
-import { force } from '../thunk';
+import type {
+  NixAttrs,
+  NixBool,
+  NixFloat,
+  NixFunction,
+  NixInt,
+  NixList,
+  NixNull,
+  NixString,
+  NixValue,
+} from "../types";
+import { force } from "../thunk";
 
 export const isAttrs = (e: NixValue): e is NixAttrs => {
   const val = force(e);
-  return typeof val === 'object' && !Array.isArray(val) && val !== null;
+  return typeof val === "object" && !Array.isArray(val) && val !== null;
 };
 
-export const isBool = (e: NixValue): e is NixBool => typeof force(e) === 'boolean';
+export const isBool = (e: NixValue): e is NixBool => typeof force(e) === "boolean";
 
 export const isFloat = (e: NixValue): e is NixFloat => {
   const val = force(e);
-  return typeof val === 'number';  // Only number is float
+  return typeof val === "number"; // Only number is float
 };
 
-export const isFunction = (e: NixValue): e is NixFunction => typeof force(e) === 'function';
+export const isFunction = (e: NixValue): e is NixFunction => typeof force(e) === "function";
 
 export const isInt = (e: NixValue): e is NixInt => {
   const val = force(e);
-  return typeof val === 'bigint';  // Only bigint is int
+  return typeof val === "bigint"; // Only bigint is int
 };
 
 export const isList = (e: NixValue): e is NixList => Array.isArray(force(e));
@@ -29,22 +39,22 @@ export const isList = (e: NixValue): e is NixList => Array.isArray(force(e));
 export const isNull = (e: NixValue): e is NixNull => force(e) === null;
 
 export const isPath = (e: NixValue): never => {
-  throw 'Not implemented: isPath';
+  throw "Not implemented: isPath";
 };
 
-export const isString = (e: NixValue): e is NixString => typeof force(e) === 'string';
+export const isString = (e: NixValue): e is NixString => typeof force(e) === "string";
 
 export const typeOf = (e: NixValue): string => {
   const val = force(e);
 
-  if (typeof val === 'bigint') return 'int';
-  if (typeof val === 'number') return 'float';
-  if (typeof val === 'boolean') return 'bool';
-  if (typeof val === 'string') return 'string';
-  if (val === null) return 'null';
-  if (Array.isArray(val)) return 'list';
-  if (typeof val === 'function') return 'lambda';
-  if (typeof val === 'object') return 'set';
+  if (typeof val === "bigint") return "int";
+  if (typeof val === "number") return "float";
+  if (typeof val === "boolean") return "bool";
+  if (typeof val === "string") return "string";
+  if (val === null) return "null";
+  if (Array.isArray(val)) return "list";
+  if (typeof val === "function") return "lambda";
+  if (typeof val === "object") return "set";
 
   throw new TypeError(`Unknown Nix type: ${typeof val}`);
 };
diff --git a/nix-js/runtime-ts/src/helpers.ts b/nix-js/runtime-ts/src/helpers.ts
index 959e9ac..a49dca6 100644
--- a/nix-js/runtime-ts/src/helpers.ts
+++ b/nix-js/runtime-ts/src/helpers.ts
@@ -3,8 +3,8 @@
  * Implements attribute selection, parameter validation, and lazy sets
  */
 
-import type { NixValue, NixAttrs } from './types';
-import { force_attrs, force_string } from './type-assert';
+import type { NixValue, NixAttrs } from "./types";
+import { force_attrs, force_string } from "./type-assert";
 
 /**
  * Select an attribute from an attribute set
@@ -35,11 +35,7 @@ export const select = (obj: NixValue, key: NixValue): NixValue => {
  * @param default_val - Value to return if key not found
  * @returns obj[key] if exists, otherwise default_val
  */
-export const select_with_default = (
-  obj: NixValue,
-  key: NixValue,
-  default_val: NixValue
-): NixValue => {
+export const select_with_default = (obj: NixValue, key: NixValue, default_val: NixValue): NixValue => {
   const forced_obj = force_attrs(obj);
   const forced_key = force_string(key);
 
@@ -72,7 +68,7 @@ export const select_with_default = (
 export const validate_params = (
   arg: NixValue,
   required: string[] | null,
-  allowed: string[] | null
+  allowed: string[] | null,
 ): NixAttrs => {
   const forced_arg = force_attrs(arg);
 
diff --git a/nix-js/runtime-ts/src/index.ts b/nix-js/runtime-ts/src/index.ts
index 08f5eb4..5a248de 100644
--- a/nix-js/runtime-ts/src/index.ts
+++ b/nix-js/runtime-ts/src/index.ts
@@ -4,10 +4,10 @@
  * All functionality is exported via the global `Nix` object
  */
 
-import { create_thunk, force, is_thunk, IS_THUNK } from './thunk';
-import { select, select_with_default, validate_params } from './helpers';
-import { op } from './operators';
-import { builtins, IS_PRIMOP } from './builtins';
+import { create_thunk, force, is_thunk, IS_THUNK } from "./thunk";
+import { select, select_with_default, validate_params } from "./helpers";
+import { op } from "./operators";
+import { builtins, IS_PRIMOP } from "./builtins";
 
 export type NixRuntime = typeof Nix;
 
@@ -31,5 +31,5 @@ export const Nix = {
 
 globalThis.Nix = Nix;
 declare global {
-  var Nix: NixRuntime
+  var Nix: NixRuntime;
 }
diff --git a/nix-js/runtime-ts/src/operators.ts b/nix-js/runtime-ts/src/operators.ts
index 430a0c1..e90ad5d 100644
--- a/nix-js/runtime-ts/src/operators.ts
+++ b/nix-js/runtime-ts/src/operators.ts
@@ -3,9 +3,9 @@
  * Implements all binary and unary operators used by codegen
  */
 
-import type { NixValue, NixList, NixAttrs } from './types';
-import { force } from './thunk';
-import { force_numeric, force_list, force_attrs, coerce_numeric } from './type-assert';
+import type { NixValue, NixList, NixAttrs } from "./types";
+import { force } from "./thunk";
+import { force_numeric, force_list, force_attrs, coerce_numeric } from "./type-assert";
 
 /**
  * Operator object exported as Nix.op
@@ -33,10 +33,10 @@ export const op = {
     const [av, bv] = coerce_numeric(force_numeric(a), force_numeric(b));
 
     if (bv === 0 || bv === 0n) {
-      throw new RangeError('Division by zero');
+      throw new RangeError("Division by zero");
     }
 
-    return (av as any) / (bv as any)
+    return (av as any) / (bv as any);
   },
 
   // Comparison operators (JavaScript natively supports bigint/number mixed comparison)
@@ -44,13 +44,13 @@ export const op = {
     // FIXME: Int and Float
     const av = force(a);
     const bv = force(b);
-    return av === bv
+    return av === bv;
   },
   neq: (a: NixValue, b: NixValue): boolean => {
     // FIXME: Int and Float
     const av = force(a);
     const bv = force(b);
-    return av !== bv
+    return av !== bv;
   },
   lt: (a: NixValue, b: NixValue): boolean => {
     // FIXME: Non-numeric
diff --git a/nix-js/runtime-ts/src/thunk.ts b/nix-js/runtime-ts/src/thunk.ts
index 04ecc00..7816b5c 100644
--- a/nix-js/runtime-ts/src/thunk.ts
+++ b/nix-js/runtime-ts/src/thunk.ts
@@ -3,13 +3,13 @@
  * Implements thunks for lazy evaluation of Nix expressions
  */
 
-import type { NixValue, NixThunkInterface } from './types';
+import type { NixValue, NixThunkInterface } from "./types";
 
 /**
  * Symbol used to mark objects as thunks
  * This is exported to Rust via Nix.IS_THUNK
  */
-export const IS_THUNK = Symbol('is_thunk');
+export const IS_THUNK = Symbol("is_thunk");
 
 /**
  * NixThunk class - represents a lazy, unevaluated expression
@@ -35,12 +35,7 @@ export class NixThunk implements NixThunkInterface {
  * @returns true if value is a NixThunk
  */
 export const is_thunk = (value: unknown): value is NixThunkInterface => {
-  return (
-    value !== null &&
-    typeof value === 'object' &&
-    IS_THUNK in value &&
-    value[IS_THUNK] === true
-  );
+  return value !== null && typeof value === "object" && IS_THUNK in value && value[IS_THUNK] === true;
 };
 
 /**
diff --git a/nix-js/runtime-ts/src/type-assert.ts b/nix-js/runtime-ts/src/type-assert.ts
index ce251dc..c9680bb 100644
--- a/nix-js/runtime-ts/src/type-assert.ts
+++ b/nix-js/runtime-ts/src/type-assert.ts
@@ -3,8 +3,8 @@
  * These functions force evaluation and verify the type, throwing errors on mismatch
  */
 
-import type { NixValue, NixList, NixAttrs, NixFunction, NixInt, NixFloat, NixNumber } from './types';
-import { force } from './thunk';
+import type { NixValue, NixList, NixAttrs, NixFunction, NixInt, NixFloat, NixNumber } from "./types";
+import { force } from "./thunk";
 
 /**
  * Force a value and assert it's a list
@@ -24,7 +24,7 @@ export const force_list = (value: NixValue): NixList => {
  */
 export const force_function = (value: NixValue): NixFunction => {
   const forced = force(value);
-  if (typeof forced !== 'function') {
+  if (typeof forced !== "function") {
     throw new TypeError(`Expected function, got ${typeof forced}`);
   }
   return forced;
@@ -36,7 +36,7 @@ export const force_function = (value: NixValue): NixFunction => {
  */
 export const force_attrs = (value: NixValue): NixAttrs => {
   const forced = force(value);
-  if (typeof forced !== 'object' || forced === null || Array.isArray(forced)) {
+  if (typeof forced !== "object" || forced === null || Array.isArray(forced)) {
     throw new TypeError(`Expected attribute set, got ${typeof forced}`);
   }
   return forced as NixAttrs;
@@ -48,7 +48,7 @@ export const force_attrs = (value: NixValue): NixAttrs => {
  */
 export const force_string = (value: NixValue): string => {
   const forced = force(value);
-  if (typeof forced !== 'string') {
+  if (typeof forced !== "string") {
     throw new TypeError(`Expected string, got ${typeof forced}`);
   }
   return forced;
@@ -60,7 +60,7 @@ export const force_string = (value: NixValue): string => {
  */
 export const force_bool = (value: NixValue): boolean => {
   const forced = force(value);
-  if (typeof forced !== 'boolean') {
+  if (typeof forced !== "boolean") {
     throw new TypeError(`Expected boolean, got ${typeof forced}`);
   }
   return forced;
@@ -72,7 +72,7 @@ export const force_bool = (value: NixValue): boolean => {
  */
 export const force_int = (value: NixValue): NixInt => {
   const forced = force(value);
-  if (typeof forced === 'bigint') {
+  if (typeof forced === "bigint") {
     return forced;
   }
   throw new TypeError(`Expected int, got ${typeof forced}`);
@@ -84,7 +84,7 @@ export const force_int = (value: NixValue): NixInt => {
  */
 export const force_float = (value: NixValue): NixFloat => {
   const forced = force(value);
-  if (typeof forced === 'number') {
+  if (typeof forced === "number") {
     return forced;
   }
   throw new TypeError(`Expected float, got ${typeof forced}`);
@@ -96,7 +96,7 @@ export const force_float = (value: NixValue): NixFloat => {
  */
 export const force_numeric = (value: NixValue): NixNumber => {
   const forced = force(value);
-  if (typeof forced === 'bigint' || typeof forced === 'number') {
+  if (typeof forced === "bigint" || typeof forced === "number") {
     return forced;
   }
   throw new TypeError(`Expected numeric type, got ${typeof forced}`);
@@ -107,19 +107,13 @@ export const force_numeric = (value: NixValue): NixNumber => {
  * Rule: If either is float, convert both to float; otherwise keep as bigint
  * @returns [a, b] tuple of coerced values
  */
-export const coerce_numeric = (
-  a: NixNumber,
-  b: NixNumber
-): [NixFloat, NixFloat] | [NixInt, NixInt] => {
-  const aIsInt = typeof a === 'bigint';
-  const bIsInt = typeof b === 'bigint';
+export const coerce_numeric = (a: NixNumber, b: NixNumber): [NixFloat, NixFloat] | [NixInt, NixInt] => {
+  const aIsInt = typeof a === "bigint";
+  const bIsInt = typeof b === "bigint";
 
   // If either is float, convert both to float
   if (!aIsInt || !bIsInt) {
-    return [
-      aIsInt ? Number(a) : a,
-      bIsInt ? Number(b) : b
-    ];
+    return [aIsInt ? Number(a) : a, bIsInt ? Number(b) : b];
   }
 
   // Both are integers
diff --git a/nix-js/runtime-ts/src/types.ts b/nix-js/runtime-ts/src/types.ts
index df56761..e4644a3 100644
--- a/nix-js/runtime-ts/src/types.ts
+++ b/nix-js/runtime-ts/src/types.ts
@@ -32,12 +32,7 @@ export type NixPrimitive = NixNull | NixBool | NixInt | NixFloat | NixString;
  * NixValue: Union type representing any possible Nix value
  * This is the core type used throughout the runtime
  */
-export type NixValue =
-  | NixPrimitive
-  | NixList
-  | NixAttrs
-  | NixFunction
-  | NixThunkInterface;
+export type NixValue = NixPrimitive | NixList | NixAttrs | NixFunction | NixThunkInterface;
 
 // Operator function signatures
 export type BinaryOp<T = NixValue, U = NixValue, R = NixValue> = (a: T, b: U) => R;