python2.pkgs.catalogue: keep 1.0.0 for python 2

pkgs/development/python-modules/catalogue/1.nix

@@ -0,0 +1,24 @@
+{ stdenv
+, buildPythonPackage
+, fetchPypi
+, importlib-metadata
+}:
+
+buildPythonPackage rec {
+  pname = "catalogue";
+  version = "1.0.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "d74d1d856c6b36a37bf14aa6dbbc27d0582667b7ab979a6108e61a575e8723f5";
+  };
+
+  propagatedBuildInputs = [ importlib-metadata ];
+
+  meta = with stdenv.lib; {
+    description = "Tiny library for adding function or object registries";
+    homepage = "https://github.com/explosion/catalogue";
+    license = licenses.mit;
+    maintainers = with maintainers; [ danieldk ];
+    };
+}

pkgs/top-level/python-packages.nix

@@ -566,7 +566,10 @@ in {
 
   cadquery = callPackage ../development/python-modules/cadquery { };
 
-  catalogue = callPackage ../development/python-modules/catalogue { };
+  catalogue = if isPy3k then
+    callPackage ../development/python-modules/catalogue { }
+  else
+    callPackage ../development/python-modules/catalogue/1.nix { };
 
   cbeams = callPackage ../misc/cbeams { };