diff --git a/pkgs/tools/package-management/nix/default.nix b/pkgs/tools/package-management/nix/default.nix
index 11edda06f13..93463509b79 100644
--- a/pkgs/tools/package-management/nix/default.nix
+++ b/pkgs/tools/package-management/nix/default.nix
@@ -7,7 +7,7 @@
 
 let
 
-  common = { name, suffix ? "", src, patchPhase, fromGit ? false }: stdenv.mkDerivation rec {
+  common = { name, suffix ? "", src, patchPhase ? "", fromGit ? false }: stdenv.mkDerivation rec {
     inherit name src patchPhase;
     version = lib.getVersion name;