Fix mkTf2Config derivation names ending with a dash -

Also changed some of the source derivation names to keep our sanity

tf2/packages/huds/hud-db/default.nix

@@ -6,7 +6,7 @@ builtins.mapAttrs
     env.description = e.description;
     custom = [
       (fetchFromGitHub (builtins.removeAttrs e.src ["__type"] // {
-        inherit name;
+        name = "${name}-src";
       }))
     ];
   })