138|     else
          139|       throw "fetchurl requires either `url` or `urls` to be set: ${lib.generators.toPretty { } args}";
             |       ^
          140|

       error: fetchurl requires either `url` or `urls` to be set: { }

Cannot nix-instantiate `fetchurl.passthru.tests` because:
error: attribute 'tests' in selection path 'fetchurl.passthru.tests' not found