anchor.diff:    gnused = pkgs.gnused.crossDrv;
     gnugrep = pkgs.gnugrep.crossDrv;
     gawk = pkgs.gawk.crossDrv;
  -  gnutar = pkgs.gnutar.crossDrv;
     gzip = pkgs.gzip.crossDrv;
     bzip2 = pkgs.bzip2.crossDrv;
     gnumake = pkgs.gnumake.crossDrv;
  
positive.code: 
  rec {
  
    coreutilsMinimal = (pkgs.coreutils.override (args: {
      # We want coreutils without ACL support.
      aclSupport = false;
      # Our tooling currently can't handle scripts in bin/, only ELFs and symlinks.
      singleBinary = "symlinks";
    })).crossDrv;
  
    busyboxMinimal = (pkgs.busybox.override {
      useMusl = true;
  
negative.code:         cp -d ${gnugrep}/bin/grep $out/bin
          cp ${gawk}/bin/gawk $out/bin
          cp -d ${gawk}/bin/awk $out/bin
          cp ${tarMinimal}/bin/tar $out/bin
          cp ${gzip}/bin/gzip $out/bin
          cp ${bzip2.bin}/bin/bzip2 $out/bin
          cp -d ${gnumake}/bin/* $out/bin
  