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{ lib, stdenv, fetchpatch, fetchFromGitHub, cmake, zlib, gmp, jdk8,
  # The JDK we use on Darwin currently makes extensive use of rpaths which are
  # annoying and break the python library, so let's not bother for now
  includeJava ? !stdenv.hostPlatform.isDarwin, includeGplCode ? true }:

with lib;

let
  boolToCmake = x: if x then "ON" else "OFF";

  rev    = "1.8.0";
  sha256 = "0q3a8x3iih25xkp2bm842sm2hxlb8hxlls4qmvj7vzwrh4lvsl7b";

  pname   = "monosat";
  version = rev;

  src = fetchFromGitHub {
    owner = "sambayless";
    repo  = pname;
    inherit rev sha256;
  };

  patches = [
    # Python 3.8 compatibility
    (fetchpatch {
      url = "https://github.com/sambayless/monosat/commit/a5079711d0df0451f9840f3a41248e56dbb03967.patch";
      sha256 = "1p2y0jw8hb9c90nbffhn86k1dxd6f6hk5v70dfmpzka3y6g1ksal";
    })
  ];

  # source behind __linux__ check assumes system is also x86 and
  # tries to disable x86/x87-specific extended precision mode
  # https://github.com/sambayless/monosat/issues/33
  commonPostPatch = lib.optionalString (!stdenv.hostPlatform.isx86) ''
    substituteInPlace src/monosat/Main.cc \
      --replace 'defined(__linux__)' '0'
  '';

  core = stdenv.mkDerivation {
    name = "${pname}-${version}";
    inherit src patches;
    postPatch = commonPostPatch;
    nativeBuildInputs = [ cmake ];
    buildInputs = [ zlib gmp jdk8 ];

    cmakeFlags = [
      "-DBUILD_STATIC=OFF"
      "-DJAVA=${boolToCmake includeJava}"
      "-DGPL=${boolToCmake includeGplCode}"

      # file RPATH_CHANGE could not write new RPATH
      "-DCMAKE_SKIP_BUILD_RPATH=ON"
    ];

    postInstall = optionalString includeJava ''
      mkdir -p $out/share/java
      cp monosat.jar $out/share/java
    '';

    passthru = { inherit python; };

    meta = {
      description = "SMT solver for Monotonic Theories";
      platforms   = platforms.unix;
      license     = if includeGplCode then licenses.gpl2 else licenses.mit;
      homepage    = "https://github.com/sambayless/monosat";
      maintainers = [ maintainers.acairncross ];
    };
  };

  python = { buildPythonPackage, cython, pytestCheckHook }: buildPythonPackage {
    inherit pname version src patches;

    propagatedBuildInputs = [ core cython ];

    # This tells setup.py to use cython, which should produce faster bindings
    MONOSAT_CYTHON = true;

    # After patching src, move to where the actually relevant source is. This could just be made
    # the sourceRoot if it weren't for the patch.
    postPatch = commonPostPatch + ''
      cd src/monosat/api/python
    '' +
    # The relative paths here don't make sense for our Nix build
    # TODO: do we want to just reference the core monosat library rather than copying the
    # shared lib? The current setup.py copies the .dylib/.so...
    ''
      substituteInPlace setup.py \
        --replace 'library_dir = "../../../../"' 'library_dir = "${core}/lib/"'
    '';

    nativeCheckInputs = [ pytestCheckHook ];

    disabledTests = [
      "test_assertAtMostOne"
      "test_assertEqual"
    ];
  };
in core