Hi!
For original issue (no proper cache key taking arch into account) there’s a fix deployed - see https://github.com/travis-ci/travis-build/pull/1801
@oskar - feedback much appreciated, thank you. As @stefantalpalaru already corrected pointed out, a case with build matrix where specific job characteristics are shared by more than one job, adding a public env to create unique cache entires is a proper approach. Thanks for surfacing that one @stefantalpalaru!