example.nix

{ stdenv, fetchurl }:

stdenv.mkDerivation rec {
  name = "your-program-${version}";
  version = "1.2.3";

  src = fetchurl {
    url = "https://your-program.com/download/v${version}.tar.gz";
    sha256 = "05s3kvsz6pzh4.......lqwg0qn0ljz58sdqh";
  };

  phases = [ "installPhase" "fixupPhase" ];

  installPhase = ''
    mkdir -p $out/bin
    cp -r ./bin/* $out/bin

    # and if needed:
    patchelf \
      --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" \
      --set-rpath "${stdenv.cc.cc}/lib64:${stdenv.cc.cc}/lib" \
      $out/bin/your-program
  '';

  meta = with stdenv.lib; {
    description = "A super your-program that does something";
    homepage = https://your-program.com/;
    license = licenses.mit;
    maintainers = [ maintainers.you ];
    platforms = platforms.linux;
  };
}