When my shell scripts depend on another script ... they run the other script. Make definitely has its place, especially when dependencies get complex and parallel, but it's hardly necessary for simple cases. Once Make is needed, it's trivial to drop in and have it wrap the standalone scripts.

I build .tf files from parameters for each host in the Makefile (and script which knows the vSphere topology) for one-shot execution (it only creates the VM, it doesn’t manage the lifecycle) and also template config that needs to be done before deployment - there are plenty of dependencies