On Tue, 13 Mar 2001, J. Buck Caldwell wrote:
> See, I just avoid all that environment stuff from the get-go. I mount the source tree NFS Read-Only, then union-mount a local filesystem over the usr/src on each
> machine I intend to build on. Works like a charm - leaves the source tree untaintened, and keeps all of the arch-specific stuff on each build machine.

That's what I used to do too, but union mounts with a NFS lower layer
are broken in -current :( (PR kern/11731)