python.pkgs.recommonmark: fix eval

pkgs/development/python-modules/recommonmark/default.nix

@@ -5,6 +5,7 @@
 , CommonMark
 , docutils
 , sphinx
+, isPy3k
 }:
 
 buildPythonPackage rec {
@@ -30,11 +31,12 @@ buildPythonPackage rec {
     "test_integration"
   ];
 
+  disabled = isPy3k; # Not yet compatible with latest Sphinx.
+
   meta = {
     description = "A docutils-compatibility bridge to CommonMark";
     homepage = "https://github.com/rtfd/recommonmark";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ fridh ];
-    broken = true; #broke until it works with sphinx 3
   };
 }