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@civodul @JeroenBaten cadappl is a proprietary card-house-of-shell-scripts package manager developed by Philips in the late 80s (or early nineties?) for use by CAD APPLication users. If I remember correctly.

Its main feature is the ability to create ephemeral (? or at least parallel) environments with specific versions of applications by using symlinks to the NFS share so that a developer could use specific and (many) different versions of softwares for different projects and share it with co-workers. Something that wasn't supported by pkg (and neither by successors like dpkg or rpm).

It has been inherited by several companies in the Eindhoven region that were formerly Philips such as ASML and NXP and use has spread beyond the CAD domain. Chances are none of them will never get rid of it.