I don't have a makefile example, but I do functionally the same thing with shell scripts.

I let GitHub actions do things like the initial environment configuration and the post-run formatting/annotation, but all of the actual work is done by my scripts:

https://github.com/Hammerspoon/hammerspoon/blob/master/.gith...

Sure, here's one example: https://github.com/JanMa/nomad-driver-nspawn/blob/master/.gi...

It doesn't (perhaps yet?) install the dependencies from the Makefile, but it runs a number of commands from the Makefile, eg, make test-leaks:

https://github.com/williamcotton/webdsl/blob/main/.github/wo...