diff --git a/pkgs/by-name/co/cook-cli/package.nix b/pkgs/by-name/co/cook-cli/package.nix
index a856cffb16ef..71bb6cdfe415 100644
--- a/pkgs/by-name/co/cook-cli/package.nix
+++ b/pkgs/by-name/co/cook-cli/package.nix
@@ -35,7 +35,7 @@ rustPlatform.buildRustPackage rec {
     openssl
   ];
 
-  OPENSSL_NO_VENDOR = 1;
+  env.OPENSSL_NO_VENDOR = 1;
 
   npmDeps = fetchNpmDeps {
     inherit src;