anchor.diff:  {
     lib,
     stdenv,
  -  clangStdenv,
     fetchFromGitHub,
     opencl-headers,
     cmake,
  
positive.code:     "-DAPICORE=ON"
      "-DETHDBUS=OFF"
      "-DCMAKE_BUILD_TYPE=Release"
    ] ++ lib.optionals (!cudaSupport) [
      "-DETHASHCUDA=OFF" # on by default
    ];
  
    nativeBuildInputs = [
      cmake
  
negative.code:   openssl,
    pkg-config,
    cli11
  }:
  
  stdenv.mkDerivation rec {
    pname = "ethminer";
    version = "0.19.0";
  
  