anchor.diff:  
     # Disable dependency that needs fixes before it will work on Darwin or Arm
     disDarwinOrArmFix = origArg: minVer: fixArg: if ((isDarwin || isAarch32) && reqMin minVer) then fixArg else origArg;
  -
  -  vaapiSupport = reqMin "0.6" && ((isLinux || isFreeBSD) && !isAarch32);
  -
  -  vpxSupport = reqMin "0.6" && !isAarch32;
   in
   
   stdenv.mkDerivation rec {
  -
     pname = "ffmpeg";
     inherit version;
   
  
positive.code:       "--enable-ffmpeg"
        "--disable-ffplay"
        (ifMinVer "0.6" "--enable-ffprobe")
        (if reqMin "4" then null else "--disable-ffserver")
      # Libraries
        (ifMinVer "0.6" "--enable-avcodec")
        (ifMinVer "0.6" "--enable-avdevice")
  
negative.code:     # Build flags
        "--enable-shared"
        (ifMinVer "0.6" "--enable-pic")
        (ifMinVer "4.0" (enableFeature srtSupport "libsrt"))
        (enableFeature runtimeCpuDetectBuild "runtime-cpudetect")
        "--enable-hardcoded-tables"
      ] ++
  