diff --git a/pkgs/development/python-modules/ruamel-yaml-clib/default.nix b/pkgs/development/python-modules/ruamel-yaml-clib/default.nix
index b12920fc7640..143452274abb 100644
--- a/pkgs/development/python-modules/ruamel-yaml-clib/default.nix
+++ b/pkgs/development/python-modules/ruamel-yaml-clib/default.nix
@@ -5,12 +5,13 @@
 
 buildPythonPackage rec {
   pname = "ruamel-yaml-clib";
-  version = "0.2.4";
+  version = "0.2.6";
+  format = "setuptools";
 
   src = fetchhg {
     url = "http://hg.code.sf.net/p/ruamel-yaml-clib/code";
     rev = version;
-    sha256 = "sha256-HQZY1opUvVQdXUHmsZmcYX2vfgjKsl6xATmVIXjnBlc=";
+    sha256 = "sha256-mpkh9JhYKRX47jfKprjt1Vpm9DMz8LcWzkotJ+/xoxY=";
   };
 
   # no tests