{ fetchFromGitHub, lib, stdenv, cmake, buildPackages, asciidoc, libxslt }:

let
  isCrossCompiling = stdenv.hostPlatform != stdenv.buildPlatform;
in

stdenv.mkDerivation rec {
  pname = "scas";
  version = "0.5.5";

  src = fetchFromGitHub {
    owner = "KnightOS";
    repo = "scas";
    rev = version;
    sha256 = "sha256-JGQE+orVDKKJsTt8sIjPX+3yhpZkujISroQ6g19+MzU=";
  };

  cmakeFlags = [ "-DSCAS_LIBRARY=1" ];
  postPatch = ''
    substituteInPlace CMakeLists.txt \
      --replace "TARGETS scas scdump scwrap" "TARGETS scas scdump scwrap generate_tables"
  '';
  strictDeps = true;

  depsBuildBuild = lib.optionals isCrossCompiling [ buildPackages.knightos-scas ];
  nativeBuildInputs = [ asciidoc libxslt.bin cmake ];

  env.NIX_CFLAGS_COMPILE = toString (lib.optionals stdenv.cc.isClang [
    "-Wno-error=implicit-function-declaration"
  ]);

  postInstall = ''
    cd ..
    make DESTDIR=$out install_man
  '';

  meta = with lib; {
    homepage    = "https://knightos.org/";
    description = "Assembler and linker for the Z80";
    license     = licenses.mit;
    maintainers = with maintainers; [ siraben ];
    platforms   = platforms.all;
  };
}