diff --git a/pkgs/development/python-modules/pycmarkgfm/default.nix b/pkgs/development/python-modules/pycmarkgfm/default.nix
index 5ccfde2c06b8..9dc1542133e5 100644
--- a/pkgs/development/python-modules/pycmarkgfm/default.nix
+++ b/pkgs/development/python-modules/pycmarkgfm/default.nix
@@ -3,6 +3,7 @@
 buildPythonPackage rec {
   pname = "pycmarkgfm";
   version = "1.2.0";
+  format = "setuptools";
   disabled = isPy27;
 
   src = fetchPypi {