diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index d745a065d10..e04eeb770c8 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2070,7 +2070,7 @@ in {
   blaze = callPackage ../development/python-modules/blaze { };
 
   # Needed for FlexGet 1.2.337 and calibre 2.76.0
-  html5lib_0_9999999 = self.html5lib.override rec {
+  html5lib_0_9999999 = self.html5lib.overridePythonAttrs rec {
     name = "html5lib-${version}";
     buildInputs = with self; [ nose flake8 ];
     propagatedBuildInputs = with self; [ six ];