anchor.diff:        sha256 = "aeee06e4d8b18d852c61ebbfe5e1bb7014b1e118e8728c1c2115f91e51bffbef";
       };
       "9.9" = { # Git
  -      version = "2017.10.18";
  -      rev = "f4090940bd3024e69d236257d327f11d1e496229";
  -      sha256 = "bb1105f0d8a65a0d7c85e9ac709be717acc546cea661ac6884930139077fe4ed";
  +      version = "2017.11.01";
  +      rev = "5ab41a25ba9ce2b3a8b5d22930161042718d7f84";
  +      sha256 = "ecf342adce1603c73b269e2f189ace100e8b51cc2c8cfadee539851707894ddb";
       };
     };
     source = sources."${channel}";
  
positive.code:     "--disable-libiec61883"
      #"--${boolEn (ilbc != null)}-libilbc"
      "--disable-libilbc"
      "--${boolEn (kvazaar != null)}-libkvazaar"
      "--${boolEn (libmodplug != null)}-libmodplug"
      "--${boolEn (lame != null)}-libmp3lame"
  
negative.code:     /**/"--disable-omx-rpi"
      /**/"--disable-rkmpp"
      "--${boolEn (libva != null)}-vaapi"
      (deprfflag "--disable-vda" null "3.4")  # macOS
      "--${boolEn (libvdpau != null)}-vdpau"
      "--disable-videotoolbox"  # macOS
      # Undocumented
  