anchor.diff:    stage1Flavours = [ "coreos" "fly" ];
   
   in stdenv.mkDerivation rec {
  -  version = "1.9.1";
  +  version = "1.10.1";
     name = "rkt-${version}";
     BUILDDIR="build-${name}";
   
  
positive.code: 
    installPhase = ''
      mkdir -p $out/bin
      cp -Rv $BUILDDIR/bin/* $out/bin
      wrapProgram $out/bin/rkt \
        --prefix LD_LIBRARY_PATH : ${systemd}/lib \
        --prefix PATH : ${iptables}/bin
  
negative.code:       rev = "v${version}";
        owner = "coreos";
        repo = "rkt";
        sha256 = "0hy6b0lyjsh0m1ca7hga31nybrbi9wpf8c59wbzvm1wlnqzsjkqi";
    };
  
    stage1BaseImage = fetchurl {
  