anchor.diff:      };
       "9.9" = {  # Git
         fetchzipversion = 6;
  -      version = "2018.08.21";
  -      rev = "24b24e14d64730ed90ae00744f091c74f30cff7a";
  -      sha256 = "99f022ee83dea7bee67d6e70e4cc8d905e0122056054e7c76e6eba17f044d80e";
  +      version = "2019.02.14";
  +      rev = "9e1e5213933dfed529f0cecac7304236a786177e";
  +      sha256 = "daeb1af827a9a3331a99efb11bf57ee06dcc65eaa4fb0438469caba52d7f2620";
       };
     };
     source = sources."${channel}";
  
positive.code:     "--${boolEn (x264 != null)}-libx264"
      "--${boolEn (x265 != null)}-libx265"
      "--${boolEn (xavs != null)}-libxavs"
      #"--${boolEn (libxcb != null)}-libxcb"
      "--${boolEn libxcbshmExtlib}-libxcb-shm"
      "--${boolEn libxcbxfixesExtlib}-libxcb-xfixes"
  
negative.code:     #"--${boolEn (libcdio != null)}-libcdio"
      /**/"--disable-libcdio"
      /**/(fflag "--disable-libcodec2" "4.0")
      /**/(fflag "--disable-libdav1d" "4.1")
      /**/(fflag "--disable-libdavs2" "4.1")
      "--${boolEn (
        libdc1394 != null
  