diff --git a/pkgs/development/python-modules/osc-lib/default.nix b/pkgs/development/python-modules/osc-lib/default.nix
index 95c5e5d6a328..e9a662412b77 100644
--- a/pkgs/development/python-modules/osc-lib/default.nix
+++ b/pkgs/development/python-modules/osc-lib/default.nix
@@ -1,6 +1,6 @@
 { lib
 , buildPythonPackage
-, fetchPypi
+, fetchFromGitHub
 , cliff
 , oslo-i18n
 , oslo-utils
@@ -13,13 +13,18 @@
 
 buildPythonPackage rec {
   pname = "osc-lib";
-  version = "2.5.0";
+  version = "unstable-2022-03-09";
 
-  src = fetchPypi {
-    inherit pname version;
-    sha256 = "sha256-2PikUPqyoSlOCu+M3JolWhvMW1jhsvYJjjXm2x4T6dE=";
+  src = fetchFromGitHub {
+    owner = "openstack";
+    repo = "osc-lib";
+    rev = "65c73fd5030276e34f3d52c03ddb9d27cd8ec6f5";
+    sha256 = "sha256-CLE9lrMMlvVrihe+N4wvIKe8t9IZ1TpHHVdn2dnvAOI=";
   };
 
+  # fake version to make pbr.packaging happy and not reject it...
+  PBR_VERSION = "2.5.0";
+
   nativeBuildInputs = [
     pbr
   ];