anchor.diff:  }:
   
   with {
  -  inherit (stdenv)
  -    isi686
  -    is64bit;
     inherit (stdenv.lib)
       enFlag
       otFlag;
   };
   
  -assert enable10bit -> is64bit;
   assert (
     chroma == "420" ||
     chroma == "422" ||
  
positive.code:     "--disable-win32thread"
      "--disable-interlaced"
      "--bit-depth=${
        if (enable10bit && is64bit) then
          "10"
        else
          "8"
  
negative.code:     "--enable-asm"
      "--disable-debug"
      "--disable-gprof"
      "--enable-pic"
      "--disable-avs"
      "--disable-swscale"
      "--disable-lavf"
  