error:
       … while calling the 'fetchurl' builtin
         at /pwd/lang/eval-fail-fetchurl-baseName-attrs-name.nix:1:1:
            1| builtins.fetchurl { url = "https://example.com/foo.tar.gz"; name = "~wobble~"; }
             | ^
            2|

       error: invalid store path name when fetching URL 'https://example.com/foo.tar.gz': name '~wobble~' contains illegal character '~'. Please change the value for the 'name' attribute passed to 'fetchurl', so that it can create a valid store path.