sysutils/stow - The NetBSD Packages Collection

Stow is a tool for managing the installation of multiple software
packages in the same run-time directory tree.  One historical
difficulty of this task has been the need to administer, upgrade,
install and remove files in independent packages without confusing
them with other files sharing the same filesystem space.

The approach used by Stow is to install each package into its own
tree, then use symbolic links to make it appear as though the files
are installed in the common tree.  Administration can be performed in
the package's private tree in isolation from clutter from other
packages.

Stow was inspired by Carnegie-Mellon's Depot program, but is
substantially smaller.