diff --git a/pkgs/by-name/le/leiningen/package.nix b/pkgs/by-name/le/leiningen/package.nix
index a25997dd8283..01550fdb9768 100644
--- a/pkgs/by-name/le/leiningen/package.nix
+++ b/pkgs/by-name/le/leiningen/package.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-tyGlc69jF4TyfMtS5xnm0Sh9nTlRrVbTFtOPfs+oGqI=";
   };
 
-  JARNAME = "leiningen-${finalAttrs.version}-standalone.jar";
+  env.JARNAME = "leiningen-${finalAttrs.version}-standalone.jar";
 
   dontUnpack = true;