diff --git a/pkgs/development/python-modules/piep/default.nix b/pkgs/development/python-modules/piep/default.nix
index 0825380a925b..ec3a9f5ec53c 100644
--- a/pkgs/development/python-modules/piep/default.nix
+++ b/pkgs/development/python-modules/piep/default.nix
@@ -10,7 +10,7 @@ buildPythonPackage rec {
   version = "0.10.0";
   format = "setuptools";
   pname = "piep";
-  disabled = isPy3k;
+  disabled = !isPy3k;
 
   src = fetchPypi {
     inherit pname version;