Dear all, I have a question about the ConfigurationOf my project, and I really hope you can help. In my project I have a package called âDevFlow-Extensionsâ that is a âplaceholderâ for code that is dependent on the Pharo version. On the ConfigurationOf, according to the Pharo version I do something like spec for: #'pharo3.x' do: [ spec blessing: #baseline. spec repository: 'http://smalltalkhub.com/mc/RobertoMinelli/DevFlow/main'. spec package: 'DevFlow-Extensions' with: 'DevFlow-Extensions30'. ]. spec for: #'pharo4.x' do: [ spec blessing: #baseline. spec repository: 'http://smalltalkhub.com/mc/RobertoMinelli/DevFlow/main'. spec package: 'DevFlow-Extensions' with: 'DevFlow-Extensions40'. ]. In this way, in Pharo 3.0 Iâd load DevFlow-Extensions30 and in Pharo 4.0 Iâd load DevFlow-Extensions40. Super cool. I am using a single package (âDevFlow-Extensionsâ) to specify of groups, for example: spec group: 'User' with: #( 'DevFlow-Meta' ... 'DevFlow-Announcement' 'DevFlow-Extensions'). Now the problem is that for Pharo 5 I have to load both 'DevFlow-Extensions40â and 'DevFlow-Extensions50â. I read the chapter on Metacello, but didnât find a solution. I tried some combinations of #includes: and #requires: but with no luck. Any help is appreciated, thank you very much! Roberto