anchor.diff:        sha256 = "aeee06e4d8b18d852c61ebbfe5e1bb7014b1e118e8728c1c2115f91e51bffbef";
       };
       "9.9" = { # Git
  -      version = "2017.11.11";
  -      rev = "fb94e7b39a170d4b7fdf66e5d997525a76f12ab2";
  -      sha256 = "e96d9717b57000627652074fbedd6723cd8507f5ea05788b4b5b48586774f026";
  +      version = "2017.12.05";
  +      rev = "c8bd2c7d09bfc71795e91f0a9aeb4b8a6833eff2";
  +      sha256 = "9d4aef0488e5744247c890194e1c5b5bba90182bbc2234dac72f43cf7a2f3a3b";
       };
     };
     source = sources."${channel}";
  
positive.code:     "--${boolEn (zeromq4 != null)}-libzmq"
      #"--${boolEn (zvbi != null)}-libzvbi"
      /**/"--disable-libzvbi"
      "--${boolEn (xz != null)}-lzma"
      #"--${boolEn decklinkExtlib}-decklink"
      /**/"--disable-decklink"
  
negative.code:     /*
       *  Hardware accelerators
       */
      (fflag "--disable-amf" "3.5")  # macOS
      "--disable-audiotoolbox"  # macOS
      "--${boolEn (
        nvidia-cuda-toolkit != null
  