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▲ WCSTombs 4 hours ago

I like to use environment modules [1] (or lmod [2]) for that purpose. You can make each manually built software package available or not on a per-shell-session basis, just by running

    module load myapp
or

    module unload myapp
in the shell where you want it (or don't). The small downside is that it only works with software that actually uses the standard environment variables like PATH, CPATH, etc. for their intended purposes rather than hardcoding filesystem paths, but in my experience it's rare to find something that doesn't. Also, you have to write a modulefile for each package, but that's not a big deal.

[1]: https://modules.readthedocs.io/en/latest/ [2]: https://lmod.readthedocs.io/en/latest/