anchor.diff:  
       src = upstream-info.binary;
   
  +    nativeBuildInputs = [ patchelfUnstable ];
  +
       phases = [ "unpackPhase" "patchPhase" "installPhase" "checkPhase" ];
   
       unpackCmd = let
  
positive.code:     patchPhase = ''
        for sofile in libwidevinecdm.so libwidevinecdmadapter.so; do
          chmod +x "$sofile"
          patchelf --set-rpath "${mkrpath [ stdenv.cc.cc ]}" "$sofile"
        done
  
        patchelf --set-rpath "$out/lib:${mkrpath [ stdenv.cc.cc ]}" \
  
negative.code: { stdenv
  , jshon
  , glib
  , nspr
  , nss
  , fetchzip
  , patchelfUnstable
  , enablePepperFlash ? false
  , enableWideVine ? false
  
  