diff --git a/pkgs/development/python-modules/hypothesis/default.nix b/pkgs/development/python-modules/hypothesis/default.nix
index ec9c5ecefa0..9e3b0cdc894 100644
--- a/pkgs/development/python-modules/hypothesis/default.nix
+++ b/pkgs/development/python-modules/hypothesis/default.nix
@@ -22,7 +22,7 @@ buildPythonPackage rec {
 
   postUnpack = "sourceRoot=$sourceRoot/hypothesis-python";
 
-  propagatedBuildInputs = [ attrs coverage ] ++ lib.optional (!isPy3k) [ enum34 ];
+  propagatedBuildInputs = [ attrs coverage ] ++ lib.optional (!isPy3k) enum34;
 
   checkInputs = [ pytest pytest_xdist flaky mock pexpect ];
   inherit doCheck;