diff --git a/pkgs/development/python-modules/generic/default.nix b/pkgs/development/python-modules/generic/default.nix
index 8502e91b6500..59e7da770c24 100644
--- a/pkgs/development/python-modules/generic/default.nix
+++ b/pkgs/development/python-modules/generic/default.nix
@@ -47,7 +47,7 @@ python.stdenv.mkDerivation (attrs // {
 
   buildInputStrings = map toString buildInputs;
 
-  builder = ./builder.sh
+  builder = ./builder.sh;
 
   pythonPath = [ setuptools] ++ pythonPath;