gettext is required regardless whether the NLS knob is turned off [1].
[1] https://github.com/gmarcais/Jellyfish/issues/138#issuecomment-463272029
Without gettext ./configure fails:
http://pkg.ftfl.ca/data/13amd64-default/2021-09-16_13h45m55s/logs/errors/Jellyfish-2.3.0_1.log