depends scons &&

optional_depends ncurses \
                 ncurses={True,False} \
                 'ncurses UI' &&

optional_depends QT \
                 qt={True,False} \
                 'QT UI' &&

optional_depends systemd \
                 systemd={True,False} \
                 'systemd socket activation' &&

optional_depends dbus \
                 dbus_export={True,False} \
                 "Enable dbus support"
