diff --git a/pkgs/by-name/ho/holo-cli/package.nix b/pkgs/by-name/ho/holo-cli/package.nix
index 44dc53470480..e3efcf600528 100644
--- a/pkgs/by-name/ho/holo-cli/package.nix
+++ b/pkgs/by-name/ho/holo-cli/package.nix
@@ -24,7 +24,7 @@ rustPlatform.buildRustPackage (finalAttrs: {
   passthru.updateScript = nix-update-script { extraArgs = [ "--version=branch" ]; };
 
   # Use rust nightly features
-  RUSTC_BOOTSTRAP = 1;
+  env.RUSTC_BOOTSTRAP = 1;
 
   nativeBuildInputs = [
     cmake