When launching Guard, I\'m getting this output:
$ guard
WARN: Unresolved specs during Gem::Specification.reset:
FYI:
gem cleanup
worked for me.
$ gem cleanup
Cleaning up installed gems...
Attempting to uninstall builder-3.2.2
Successfully uninstalled builder-3.2.2
Attempting to uninstall amatch-0.3.0
Successfully uninstalled amatch-0.3.0
Attempting to uninstall tins-1.12.0
Successfully uninstalled tins-1.12.0
Clean Up Complete