diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index a2423e8073b..362b0623569 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -6652,6 +6652,27 @@ let
     };
   };
 
+  klaus = buildPythonPackage rec {
+    version = "0.4.9";
+    name = "klaus-${version}";
+
+    src = pkgs.fetchurl {
+      url = "https://github.com/jonashaag/klaus/archive/${version}.tar.gz";
+      sha256 = "0qcbv3shz530mn53pdc68fx38ylz72033xsrz77ffi0cks32az2w";
+    };
+
+    propagatedBuildInputs = with self;
+      [ humanize httpauth dulwich pygments flask ];
+
+    meta = {
+      description = "The first Git web viewer that Just Works";
+      homepage    = "https://github.com/jonashaag/klaus";
+      #license     = licenses.mit; # I'm not sure about the license
+      maintainers = with maintainers; [ matthiasbeyer ];
+      platforms   = platforms.linux; # Can only test linux
+    };
+  };
+
   kombu = buildPythonPackage rec {
     name = "kombu-${version}";
     version = "3.0.24";