diff --git a/pkgs/development/compilers/rust/clippy.nix b/pkgs/development/compilers/rust/clippy.nix
index fa33c9e9f315..e5f1b3544f0b 100644
--- a/pkgs/development/compilers/rust/clippy.nix
+++ b/pkgs/development/compilers/rust/clippy.nix
@@ -21,7 +21,7 @@ rustPlatform.buildRustPackage {
   buildInputs = [ rustc.llvm ];
 
   # fixes: error: the option `Z` is only accepted on the nightly compiler
-  RUSTC_BOOTSTRAP = 1;
+  env.RUSTC_BOOTSTRAP = 1;
 
   # Without disabling the test the build fails with:
   # error: failed to run custom build command for `rustc_llvm v0.0.0