diff --git a/pkgs/misc/my-env/default.nix b/pkgs/misc/my-env/default.nix
index e89a8ebb230..ac2dc7f8cda 100644
--- a/pkgs/misc/my-env/default.nix
+++ b/pkgs/misc/my-env/default.nix
@@ -135,6 +135,7 @@ mkDerivation {
       ${extraCmds}
 
       nix_cleanup() {
+        :
         ${cleanupCmds}
       }