anchor.diff:      acl
       bzip2
       e2fsprogs
  +    libb2
       libxml2
       lz4
       lzo
  
positive.code: , acl
  , bzip2
  , e2fsprogs
  , libxml2
  , lz4
  , lzo
  
negative.code:   ];
  
    cmakeFlags = [
      "-DENABLE_NETTLE=OFF"
      "-DENABLE_LZO=ON"
      "-DPOSIX_REGEX_LIB=LIBPCREPOSIX"
    ];
  
  