`PREFIX` determines where the port will be installed. It defaults to [.filename]#/usr/local#, but can be set by the user to a custom path like [.filename]#/opt#. The port must respect the value of this variable.
-`DESTDIR`, if set by the user, determines the complete alternative environment, usually a jail or an installed system mounted somewhere other than [.filename]#/#. A port will actually install into [.filename]#DESTDIR/PREFIX#, and register with the package database in [.filename]#DESTDIR/var/db/pkg#. As `DESTDIR` is handled automatically by the ports infrastructure with man:chroot[8]. There is no need for modifications or any extra care to write `DESTDIR`-compliant ports.
+`DESTDIR`, if set by the user, determines the complete alternative environment, usually a jail or an installed system mounted somewhere other than [.filename]#/#. A port will actually install into [.filename]#DESTDIR/PREFIX#, and register with the package database in [.filename]#DESTDIR/var/db/pkg#. `DESTDIR` is handled automatically by the ports infrastructure with man:chroot[8]. There is no need for modifications or any extra care to write `DESTDIR`-compliant ports.
The value of `PREFIX` will be set to `LOCALBASE` (defaulting to [.filename]#/usr/local#). If `USE_LINUX_PREFIX` is set, `PREFIX` will be `LINUXBASE` (defaulting to [.filename]#/compat/linux#).