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{ fetchurl
, lib
, stdenv
, unzip
, fixDarwinDylibNames
}:

let
  versionMajor = "1";
  versionMinor = "0.6";
  version = versionMajor + "." + versionMinor;
  removeDots = lib.replaceStrings [ "." ] [ "" ];
  src-doc = fetchurl {
    url = "http://www.inchi-trust.org/download/${removeDots version}/INCHI-1-DOC.zip";
    sha256 = "1kyda09i9p89xfq90ninwi7w13k1w3ljpl4gqdhpfhi5g8fgxx7f";
   };
in
  stdenv.mkDerivation rec {
    pname = "inchi";
    inherit version;

    src = fetchurl {
      url = "http://www.inchi-trust.org/download/${removeDots version}/INCHI-1-SRC.zip";
      sha256 = "1zbygqn0443p0gxwr4kx3m1bkqaj8x9hrpch3s41py7jq08f6x28";
    };

    nativeBuildInputs = [ unzip ] ++ lib.optional stdenv.isDarwin fixDarwinDylibNames;
    outputs = [ "out" "doc" ];

    enableParallelBuilding = true;

    preConfigure = ''
      cd ./INCHI_API/libinchi/gcc
    '' + lib.optionalString stdenv.isDarwin ''
      substituteInPlace makefile \
        --replace ",--version-script=libinchi.map" "" \
        --replace "LINUX_Z_RELRO = ,-z,relro" "" \
        --replace "-soname" "-install_name" \
        --replace "gcc" $CC
    '';
    installPhase = let
      versionOneDot = versionMajor + "." + removeDots versionMinor;
    in ''
      runHook preInstall

      cd ../../..
      mkdir -p $out/lib
      mkdir -p $out/include/inchi
      mkdir -p $doc/share/

      install -m 755 INCHI_API/bin/Linux/libinchi.so.${versionOneDot}.00 $out/lib
      ln -s $out/lib/libinchi.so.${versionOneDot}.00 $out/lib/libinchi.so.1
      ln -s $out/lib/libinchi.so.${versionOneDot}.00 $out/lib/libinchi.so
      install -m 644 INCHI_BASE/src/*.h $out/include/inchi

      runHook postInstall
    '';

    preFixup = lib.optionalString stdenv.isDarwin ''
      fixDarwinDylibNames $(find "$out" -name "*.so.*")
    '';

    postInstall = ''
      unzip '${src-doc}'
      install -m 644 INCHI-1-DOC/*.pdf $doc/share
    '';

    meta = with lib; {
      homepage = "https://www.inchi-trust.org/";
      description = "IUPAC International Chemical Identifier library";
      license = licenses.lgpl2Plus;
      maintainers = with maintainers; [ rmcgibbo ];
    };
  }