anchor.diff:    openssh = linux;
     openssl = all;
     pan = linux;
  -  par2cmdline = all;
     pciutils = linux;
     pdf2xml = all;
     perl = all;
     pkg-config = all;
     pmccabe = linux;
     procps = linux;
  -  python = unix; # Cygwin builds fail
  +  python3 = unix; # Cygwin builds fail
     readline = all;
     rlwrap = all;
  -  rpm = linux;
     rpcbind = linux;
     rsync = linux;
     screen = linux ++ darwin;
     scrot = linux;
     sdparm = linux;
  -  sharutils = all;
  -  sloccount = unix; # Cygwin builds fail
     smartmontools = all;
     sqlite = unix; # Cygwin builds fail
     squid = linux;
  
positive.code:   diffutils = all;
    e2fsprogs = linux;
    emacs = linux;
    enscript = all;
    file = all;
    findutils = all;
    flex = all;
    gcc = all;
    gcj = linux;
    glibc = linux;
    glibcLocales = linux;
    gnugrep = all;
  
negative.code:   gogoclient = linux;
    grub = linux;
    grub2 = linux;
    guile = linux;  # tests fail on Cygwin
    gzip = all;
    hddtemp = linux;
  