diff --git a/pkgs/development/python-modules/green/default.nix b/pkgs/development/python-modules/green/default.nix
index 1d35978824ff..5ecf9a18ad50 100644
--- a/pkgs/development/python-modules/green/default.nix
+++ b/pkgs/development/python-modules/green/default.nix
@@ -4,14 +4,14 @@
 , termstyle
 , lxml
 , unidecode
-, mock
-, backports_shutil_get_terminal_size
 }:
 
 buildPythonPackage rec {
   pname = "green";
   version = "3.2.1";
 
+  disabled = !isPy3k;
+
   src = fetchPypi {
     inherit pname version;
     sha256 = "c5a90e247237ac7e320120961608cf65191134fa400d327cbd4d09864c880935";
@@ -19,7 +19,7 @@ buildPythonPackage rec {
 
   propagatedBuildInputs = [
     colorama coverage termstyle unidecode lxml
-  ] ++ lib.optionals (!isPy3k) [ mock backports_shutil_get_terminal_size ];
+  ];
 
   # let green run it's own test suite
   checkPhase = ''