Hi Ludo, > I just had a bright idea (yes!): this can be addressed by writing > something like this in ~/.config/guix/channels.scm: > > (map latest-commit-with-substitutes-available > %default-channels) > > The hypothetical ‘latest-commit-with-substitutes-available’ would use > (git) and (guix ci) to find the latest commit for which substitutes of > interest are available, and would return: I really like that idea, but it's a pity to limit it to channels. Two scenarii I'd like to see covered are: 1) Find the latest commit with all substitutes required by a given manifest. 2) Find the latest commit with all substitutes required for updating a given profile. This is in fact only one problem with two user interfaces. Konrad.