You have already activated X, but your Gemfile requires Y

Question

When running rake I get this error:

You have already activated rake 0.9.2, but your Gemfile requires rake 0.8.7. Consider using bundle ex

Answer 1

Ooh! The Katz article is excellent!

I like this solution the best:

bundle install --binstubs

so that you can now type

bin/rake .stuff.

For someone like myself who is developing both 2.3 and 3.0.9 apps, this makes me feel a lot better.