anchor.diff:        sha256 = "98b97e1b908dfeb6aeb6d407e5a5eacdfc253a40c2d195f5867ed2d1d46ea957";
       };
       "9.9" = { # Git
  -      version = "2017.07.28";
  -      rev = "bf8ab72ae95bb11f2c281d464594c2f6ba70326b";
  -      sha256 = "b48a4e947018c89e11481a6495e2b703ab194d7e15e8494e5873362f207eb8cc";
  +      version = "2017.09.28";
  +      rev = "47d6b02f6c3d58141ace48bb5e8971cae56f8874";
  +      sha256 = "34423e7a86b9c0798dae1a8d2d2b96f18d12c4fb90c32bd6e7a8b32a0e36e263";
       };
     };
     source = sources."${channel}";
  
positive.code:     /*
       *  External libraries
       */
      #"--${boolEn (avisynth != null)}-avisynth"
      /**/"--disable-avisynth"
      "--${boolEn (bzip2 != null)}-bzlib"
      # Recursive dependency
      "--${boolEn (chromaprint != null)}-chromaprint"
      # Undocumented (broadcom)
  
negative.code:     /*
       *  Hardware accelerators
       */
      "--disable-audiotoolbox"  # macOS
      "--${boolEn (
        nvidia-cuda-toolkit != null
        && nvidia-drivers != null)}-cuda"
      (fflag "--${boolEn (
        nvidia-cuda-toolkit != null
        && nvidia-drivers != null)}-cuda-sdk" "3.4")
      "--${boolEn (
        nvidia-cuda-toolkit != null
        && nvidia-drivers != null)}-cuvid"
      "--disable-d3d11va"  # Windows
      "--disable-dxva2"  # Windows
      (fflag "--${boolEn (libdrm != null)}-libdrm" "3.4")
      "--${boolEn (mfx-dispatcher != null)}-libmfx"
      "--${boolEn libnppSupport}-libnpp"
      #"--${boolEn (mmal != null)}-mmal"
      /**/"--disable-mmal"
      "--${boolEn nvenc}-nvenc"
      /**/(fflag "--disable-omx" "3.4")
      /**/(fflag "--disable-omx-rpi" "3.4")
      /**/(fflag "--disable-rkmpp" "3.4")
      "--${boolEn (libva != null)}-vaapi"
      "--disable-vda"  # macOS
      "--${boolEn (libvdpau != null)}-vdpau"
      "--disable-videotoolbox"  # macOS
      # Undocumented
      # FIXME
      #"--${boolEn (xorg.libXvMC != null)}-xvmc"
  