anchor.diff:  }:
   
   stdenv.mkDerivation rec {
  -  pname = "plymouth-unstable";
  -  version = "2020-12-07";
  +  pname = "plymouth";
  +  version = "unstable-2021-10-18";
   
     outputs = [
       "out"
  
positive.code:     domain = "gitlab.freedesktop.org";
      owner = "plymouth";
      repo = "plymouth";
      rev = "c4ced2a2d70edea7fbb95274aa1d01d95928df1b";
      sha256 = "7CPuKMA0fTt8DBsaA4Td74kHT/O7PW8N3awP04nUnOI=";
    };
  
    nativeBuildInputs = [
  
negative.code:     libdrm
      pango
      systemd
    ];
  
    postPatch = ''
  