gistfile1.txt

with import <nixpkgs>{};

stdenv.mkDerivation rec {
  name = "My-Tool";
  version = "0.6.3";

  src = fetchurl {
    curlOpts = "-i -L -H \'Accept:application/octet-stream\'";
    url = https://<githb-token>:@api.github.com/repos/<owner>/<repo>/releases/assets/<asset-id>;
    sha256 = "ba2af69f6b37adce6c6368d001d5bd4f30c6e3aa19e13d276e43002a3a195f38";
  };

  phases = "installPhase";

  installPhase = ''
    mkdir -p $out/bin
    cp ${src} $out/bin/mytool.jar
  '';

}