diff --git a/nix/codegen.nix b/nix/codegen.nix
index 182ad03..8030419 100644
--- a/nix/codegen.nix
+++ b/nix/codegen.nix
@@ -1,5 +1,4 @@
 {
-  stdenv,
   rustPlatform,
   lib,
 }: let
diff --git a/nix/parser.nix b/nix/parser.nix
index 752c6d9..ed20993 100644
--- a/nix/parser.nix
+++ b/nix/parser.nix
@@ -6,7 +6,7 @@
   inherit (lib.sources) sourceByRegex;
   src = sourceByRegex ../. ["Cargo.*" "(src|benches|tests|test_data)(/.*)?"];
 in
-  rustPlatform.buildRustPackage rec {
+  rustPlatform.buildRustPackage {
     pname = "demostf-parser";
     version = "0.1.0";
 
diff --git a/nix/schema.nix b/nix/schema.nix
index d820159..7a9d08b 100644
--- a/nix/schema.nix
+++ b/nix/schema.nix
@@ -1,5 +1,4 @@
 {
-  stdenv,
   rustPlatform,
   lib,
 }: let