nix: add nix-tree-rs and fast-nix-gc

flake.lock

@@ -157,6 +157,30 @@
         "type": "github"
       }
     },
+    "fast-nix-gc": {
+      "inputs": {
+        "nix-darwin": "nix-darwin",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "treefmt-nix": [
+          "treefmt"
+        ]
+      },
+      "locked": {
+        "lastModified": 1786625301,
+        "narHash": "sha256-KNAjsTgfweOoqYxMAsIolrDcIV5AikvrSW9EpJ7fnK8=",
+        "owner": "Mic92",
+        "repo": "fast-nix-gc",
+        "rev": "254a2ba0a4f1570b3880bc10bb6166afe1e25936",
+        "type": "github"
+      },
+      "original": {
+        "owner": "Mic92",
+        "repo": "fast-nix-gc",
+        "type": "github"
+      }
+    },
     "fenix": {
       "inputs": {
         "nixpkgs": [
@@ -461,6 +485,53 @@
         "type": "github"
       }
     },
+    "nix-darwin": {
+      "inputs": {
+        "nixpkgs": [
+          "fast-nix-gc",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1785389976,
+        "narHash": "sha256-0tLW8Ff5yt8AH97jw4ZpFJ0OCJ122zIlgWGDmOfU/VU=",
+        "owner": "nix-darwin",
+        "repo": "nix-darwin",
+        "rev": "15abb8c98f336cd8bd840d71059adebabe60bf04",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-darwin",
+        "repo": "nix-darwin",
+        "type": "github"
+      }
+    },
+    "nix-tree-rs": {
+      "inputs": {
+        "flake-parts": [
+          "flake-parts"
+        ],
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "treefmt-nix": [
+          "treefmt"
+        ]
+      },
+      "locked": {
+        "lastModified": 1786373799,
+        "narHash": "sha256-/MGTSKLPC6uERKHyilzRCVPDeX/AwG+4B8bf1vMHAJg=",
+        "owner": "Mic92",
+        "repo": "nix-tree-rs",
+        "rev": "31d54916fa110e9462fec799f1663224baddbadd",
+        "type": "github"
+      },
+      "original": {
+        "owner": "Mic92",
+        "repo": "nix-tree-rs",
+        "type": "github"
+      }
+    },
     "nixos-wsl": {
       "inputs": {
         "flake-compat": [
@@ -593,6 +664,7 @@
       "inputs": {
         "angrr": "angrr",
         "darkly": "darkly",
+        "fast-nix-gc": "fast-nix-gc",
         "fenix": "fenix",
         "flake-compat": "flake-compat",
         "flake-parts": "flake-parts",
@@ -605,6 +677,7 @@
         "multiverse": "multiverse",
         "my-templates": "my-templates",
         "niri-nix": "niri-nix",
+        "nix-tree-rs": "nix-tree-rs",
         "nixos-wsl": "nixos-wsl",
         "nixpkgs": "nixpkgs_2",
         "noctalia": "noctalia",

flake.nix

@@ -68,6 +68,11 @@
       url = "github:Bali10050/Darkly";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+    fast-nix-gc = {
+      url = "github:Mic92/fast-nix-gc";
+      inputs.nixpkgs.follows = "nixpkgs";
+      inputs.treefmt-nix.follows = "treefmt";
+    };
     fenix = {
       url = "github:nix-community/fenix";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -84,6 +89,12 @@
       url = "git+https://codeberg.org/bananad3v/niri-nix";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+    nix-tree-rs = {
+      url = "github:Mic92/nix-tree-rs";
+      inputs.nixpkgs.follows = "nixpkgs";
+      inputs.flake-parts.follows = "flake-parts";
+      inputs.treefmt-nix.follows = "treefmt";
+    };
     noctalia = {
       url = "github:noctalia-dev/noctalia-shell/v4.7.5";
       inputs.nixpkgs.follows = "nixpkgs";

flake/pkgs.nix

@@ -12,12 +12,23 @@
         inputs.niri-nix.overlays.niri-nix
         inputs.fenix.overlays.default
         inputs.angrr.overlays.default
-        (final: prev: {
-          darkly-qt6 = inputs.darkly.packages.${final.stdenv.hostPlatform.system}.darkly-qt6;
-
-          noctalia-shell = inputs.noctalia.packages.${final.stdenv.hostPlatform.system}.default;
-        })
         inputs.llm-agents.overlays.shared-nixpkgs
+        (
+          final: prev:
+          let
+            system = final.stdenv.hostPlatform.system;
+          in
+          {
+            darkly-qt6 = inputs.darkly.packages.${system}.darkly-qt6;
+
+            noctalia-shell = inputs.noctalia.packages.${system}.default;
+
+            nix-tree-rs = inputs.nix-tree-rs.packages.${system}.default;
+            fast-nix-gc = inputs.fast-nix-gc.packages.${system}.default.overrideAttrs {
+              doCheck = false;
+            };
+          }
+        )
       ];
       config.allowUnfree = true;
       flake.setNixPath = false;

modules/core/nix.nix

@@ -30,6 +30,8 @@ in
     environment.systemPackages = with pkgs; [
       nix-output-monitor
       nh
+      nix-tree-rs
+      fast-nix-gc
     ];
 
     environment.etc = (