anchor.diff:      "--disable-debug-printfs"
       "--disable-unit-tests"
       #"--enable-relro"
  -    (enFlag "gssapi" (kerberos != null) null)
  +    #(enFlag "gssapi" (kerberos != null) null)
       "--enable-threads"
       (enFlag "ssl" (
         gnutls != null
  
positive.code: , avahi
  , dbus
  , gnutls
  , kerberos
  , libgcrypt
  , libpaper
  , libusb
  
negative.code:     avahi
      dbus
      gnutls
      #kerberos
      libgcrypt
      libpaper
      libusb
  