anchor.diff:  { stdenv
  -, autoconf
  -, automake
  -, fetchFromGitHub
  +, fetchurl
   , gobject-introspection
  -, libtool
   , python2
   
   , cryptsetup
  
positive.code: }:
  
  let
    version = "2.15";
  in
  stdenv.mkDerivation rec {
    name = "libblockdev-${version}";
  
    src = fetchFromGitHub {
      version = 5;
      owner = "storaged-project";
      repo = "libblockdev";
      rev = "${version}-1";
      sha256 = "afe068a7d248699c1f5fa7e72bdbcc7f0055edd4eed31bf97dc930b57bc1e053";
    };
  
    nativeBuildInputs = [
      autoconf
      automake
      gobject-introspection
      libtool
      python2
    ];
  
  
negative.code:     volume_key
    ];
  
    preConfigure = ''
      export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -I${volume_key}/include/volume_key"
    
      patchShebangs scripts/boilerplate_generator.py
  