{ stdenv, fetchFromGitHub
, libpcap
, vde2
, pcre
, libedit
, SDL2
, SDL2_ttf
, libpng
, zlib
, freetype
, pkg-config
, dejavu_fonts
, ed
, cmake, ninja }:
stdenv.mkDerivation {
  pname = "open-simh";
  version = "4.0.0";
  src = fetchFromGitHub {
    owner = "open-simh";
    repo = "simh";
    rev = "d4f85d01bdf7301d5f7a2c4e51c3a84024561b26";
    sha256 = "sha256-kjLX8JeG7nPNz7KLheQCKz8kKA1xPn0CpRg+N336r1w=";
  };
  postPatch = ''
    ${ed}/bin/ed BESM6/CMakeLists.txt <<'_EOF_'
    /foreach (fdir \''${cand_fontdirs})/
    i
    string(REPLACE " " ";" extra_cand_fontdirs "$ENV{buildInputs} $ENV{nativeBuildInputs}")
    foreach(extra_fdir IN LISTS extra_cand_fontdirs)
        list(APPEND cand_fontdirs ''${extra_fdir})
    endforeach()
    .
    wq
    _EOF_'';
  buildInputs = [
    libpcap
    vde2
    pcre
    libedit
    SDL2 SDL2_ttf
    libpng
    zlib
    freetype
    pkg-config
    dejavu_fonts
  ];
  nativeBuildInputs = [ cmake ninja ];
}