anchor.diff:        --with-coreos-local-pxe-image-path=${stage1BaseImage}
         --with-coreos-local-pxe-image-systemd-version=v${coreosImageSystemdVersion}
         " else "" }
  +      --with-stage1-default-location=$out/${stage1Dir}/stage1-${builtins.elemAt stage1Flavours 0}.aci
       );
     '';
   
  
positive.code: 
    # TODO: track https://github.com/coreos/rkt/issues/1758 to allow "host" flavor.
    stage1Flavours = [ "coreos" "fly" ];
  
  in stdenv.mkDerivation rec {
    version = "1.11.0";
  
negative.code:     cp -Rv $BUILDDIR/target/bin/rkt $out/bin
  
      mkdir -p $out/lib/rkt/stage1-images/
      cp -Rv $BUILDDIR/target/bin/stage1-*.aci $out/${stage1Dir}/
  
      wrapProgram $out/bin/rkt \
        --prefix LD_LIBRARY_PATH : ${systemd}/lib \
  