anchor.diff:        cp ${stdenv.shell} $out/on-server/sh
         cp ${cpio}/bin/cpio $out/on-server
         cp ${coreutils_}/bin/mkdir $out/on-server
  -      cp ${bzip2.bin}/bin/bzip2 $out/on-server
  +      cp ${bzip2_.bin}/bin/bzip2 $out/on-server
   
         chmod u+w $out/on-server/*
         strip $out/on-server/*
  
positive.code:       cp -d ${gawk}/bin/awk $out/bin
        cp ${gnutar}/bin/tar $out/bin
        cp ${gzip}/bin/gzip $out/bin
        cp ${bzip2.bin}/bin/bzip2 $out/bin
        cp -d ${gnumake}/bin/* $out/bin
        cp -d ${patch}/bin/* $out/bin
        cp -d ${xz.bin}/bin/xz $out/bin
  
negative.code:     # Our tooling currently can't handle scripts in bin/, only ELFs and symlinks.
      singleBinary = "symlinks";
    });
  
    # Avoid debugging larger changes for now.
    bzip2_ = bzip2.override (args: { linkStatic = true; });
  
    build = stdenv.mkDerivation {
      name = "stdenv-bootstrap-tools";
  