anchor.diff:  }:
   
   let
  -  rev = "d7dea508d1a4d2052f7578d2e2be32162040d3a5";
  -  date = "2018-06-10";
  +  rev = "3649ed23c6b4392d692580c03b10a611e3eaaa32";
  +  date = "2018-06-17";
   in
   stdenv.mkDerivation rec {
     name = "libarchive-${date}";
  
positive.code:     owner = "libarchive";
      repo = "libarchive";
      inherit rev;
      sha256 = "ebe4cf59c1a6bb757d31452af4893fecc4e9d000c5914316f6b2932105fcdec8";
    };
  
    nativeBuildInputs = [
  
negative.code: 
    buildInputs = [
      acl
      bzip2
      e2fsprogs
      libxml2
  