[[!comment format=mdwn username="joey" subject="""comment 2""" date="2018-04-30T13:24:30Z" content=""" Seems this must be caused by [[!commit d8d2faece72eabd18c2ff303e5fb63c3a69961f6]] And I guess you've modified the config.hs in propellor for your own systems? You will indeed need to add dependencies to the cabal stanza for propellor-config. I think that you may be able to add Other-Modules: Utility.FileMode to the cabal stanza for propellor-config and get access to the unexported module that way. Not 100% sure. I'm curious: Is there part of propellor's published modules that made you need something from Utility.FileMode to use it, or were you writing your own property and happened to use something from Utility.FileMode? """]]