diff --git a/src/builtins/mod.rs b/src/builtins/mod.rs
index 7db747d..344a6c7 100644
--- a/src/builtins/mod.rs
+++ b/src/builtins/mod.rs
@@ -1,5 +1,3 @@
-use derive_more::Constructor;
-
 use crate::vm::Env;
 use crate::ty::internal::{Const, Value, AttrSet, PrimOp};
 use crate::ty::common::Symbol;
diff --git a/src/ty/internal/cnst.rs b/src/ty/internal/cnst.rs
index 05f2745..af022ed 100644
--- a/src/ty/internal/cnst.rs
+++ b/src/ty/internal/cnst.rs
@@ -1,5 +1,3 @@
-use std::hash::{Hash, Hasher};
-
 use anyhow::Error;
 use derive_more::{IsVariant, Unwrap};
 
diff --git a/src/ty/public/cnst.rs b/src/ty/public/cnst.rs
index 4d1def7..4527555 100644
--- a/src/ty/public/cnst.rs
+++ b/src/ty/public/cnst.rs
@@ -23,7 +23,7 @@ impl From<i::Const> for Const {
             Int(int) => Const::Int(int),
             Float(float) => Const::Float(float),
             String(string) => Const::String(string),
-            Func(func) => Const::Func
+            Func(_) => Const::Func
         }
     }
 }