python3Packages: add pkgs. prefix

Co-authored-by: Fabian Affolter <mail@fabian-affolter.ch>

pkgs/top-level/python-aliases.nix

@@ -86,8 +86,8 @@ mapAliases ({
   smmap2 = throw "smmap2 has been deprecated, use smmap instead."; # added 2020-03-14
   sphinxcontrib_plantuml = sphinxcontrib-plantuml; # added 2021-08-02
   sqlalchemy_migrate = sqlalchemy-migrate; # added 2021-10-28
-  topydo = throw "topydo was moved to topydo"; # added 2017-09-22
-  tvnamer = throw "tvnamer was moved to tvnamer"; # added 2021-07-05
+  topydo = throw "topydo was moved to pkgs.topydo"; # added 2017-09-22
+  tvnamer = throw "tvnamer was moved to pkgs.tvnamer"; # added 2021-07-05
   WazeRouteCalculator = wazeroutecalculator; # added 2021-09-29
   websocket_client = websocket-client; # added 2021-06-15
   zc-buildout221 = zc-buildout; # added 2021-07-21