{ stdenv, fetchFromGitHub, cmake, pkgconfig, python
, zlib, libssh2, openssl, http-parser, curl, libiconv
}:

stdenv.mkDerivation (rec {
  version = "0.25.1";
  name = "libgit2-${version}";

  src = fetchFromGitHub {
    owner = "libgit2";
    repo = "libgit2";
    rev = "v${version}";
    sha256 = "1jhikg0gqpdzfzhgv44ybdpm24lvgkc7ki4306lc5lvmj1s2nylj";
  };

  cmakeFlags = "-DTHREADSAFE=ON";

  nativeBuildInputs = [ cmake python pkgconfig ];

  buildInputs = [ zlib libssh2 openssl http-parser curl ];

  enableParallelBuilding = true;

  meta = {
    description = "The Git linkable library";
    homepage = https://libgit2.github.com/;
    license = stdenv.lib.licenses.gpl2;
    platforms = with stdenv.lib.platforms; all;
  };
} // stdenv.lib.optionalAttrs (!stdenv.isLinux) {
  NIX_LDFLAGS = "-liconv";
  propagatedBuildInputs = [ libiconv ];
})