anchor.diff:      "--localstatedir=/var"
       "--sysconfdir=/etc"
       "--disable-mallinfo"
  -    (enFlag "libpaper" (libpaper != null) null)
  -    (enFlag "libusb" (libusb != null) null)
  +    "--${boolEn (libpaper != null)}-libpaper"
  +    "--${boolEn (libusb != null)}-libusb"
       #--enable-tcp-wrappers
  -    (enFlag "acl" (acl != null) null)
  -    (enFlag "dbus" (dbus != null) null)
  +    "--${boolEn (acl != null)}-acl"
  +    "--${boolEn (dbus != null)}-dbus"
       "--enable-shared"
       "--disable-libtool-unsupported"
       "--disable-debug"
  
positive.code:     "--without-java"
      "--without-perl"
      "--without-php"
      (wtFlag "python" (python2 != null) null)
    ];
  
    preInstall = ''
  
negative.code:     # --with-rundir=/run/cups
      # XXX: flag is not a proper boolean, build fails with optim enabled
      #"--without-optim"
      "--${boolWt (systemd_lib != null)}-systemd"
      "--with-languages=all"
      # --with-cups-user=lp
      # --with-cups-group=lp
  