{
  fetchurl,
  buildDotnetPackage,
  unzip,
}:

attrs@{
  pname,
  version,
  url ? "https://www.nuget.org/api/v2/package/${pname}/${version}",
  sha256 ? "",
  md5 ? "",
  ...
}:
if md5 != "" then
  throw "fetchnuget does not support md5 anymore, please use sha256"
else
  buildDotnetPackage (
    {
      src = fetchurl {
        inherit url sha256;
        name = "${pname}.${version}.zip";
      };

      sourceRoot = ".";

      nativeBuildInputs = [ unzip ];

      dontBuild = true;

      preInstall = ''
        function traverseRename () {
          for e in *
          do
            t="$(echo "$e" | sed -e "s/%20/\ /g" -e "s/%2B/+/g")"
            [ "$t" != "$e" ] && mv -vn "$e" "$t"
            if [ -d "$t" ]
            then
              cd "$t"
              traverseRename
              cd ..
            fi
          done
        }

        traverseRename
      '';
    }
    // attrs
  )