[[!comment format=mdwn username="joey" subject="""comment 3""" date="2018-08-26T14:34:18Z" content=""" @david, you might need to edit your config.cabal and specify a newer propellor version, although cabal usually picks the most recent version of a dependency. Propellor got the patch from this page in version 5.3.4. Anyway, I don't think the version of propellor matters, the error message you quote is related to . I think that the apt key you're using has been generated on a newer system and won't work with older gpg. """]]