{ lib, stdenv, fetchFromGitHub, zlib, openssl, libre
, cmake }:

stdenv.mkDerivation rec {
  version = "2.12.0";
  pname = "librem";
  src = fetchFromGitHub {
    owner = "baresip";
    repo = "rem";
    rev = "v${version}";
    sha256 = "sha256-MsXSUxFH89EqxMe4285xFV1Tsqmv2l5RnEeli48O3XQ=";
  };
  nativeBuildInputs = [ cmake ];
  buildInputs = [ zlib openssl libre ];
  cmakeFlags = [
    "-DRE_INCLUDE_DIR=${libre}/include/re"
  ];
  makeFlags = [
    "LIBRE_MK=${libre}/share/re/re.mk"
    "PREFIX=$(out)"
    "AR=${stdenv.cc.targetPrefix}ar"
  ]
  ++ lib.optional (stdenv.cc.cc != null) "SYSROOT_ALT=${lib.getDev stdenv.cc.cc}"
  ++ lib.optional (stdenv.cc.libc != null) "SYSROOT=${lib.getDev stdenv.cc.libc}"
  ;
  enableParallelBuilding = true;
  meta = {
    description = "A library for real-time audio and video processing";
    homepage = "https://github.com/baresip/rem";
    maintainers = with lib.maintainers; [ elohmeier raskin ];
    license = lib.licenses.bsd3;
  };
}