Do not write anything to files outside WRKDIR. WRKDIR is the only place that is guaranteed to be writable during the port build (see installing ports from a CDROM for an example of building ports from a read-only tree). If you need to modify one of the pkg-* files, do so by redefining a variable, not by writing over it.

For questions about the FreeBSD ports system, e-mail <[email protected]>.
For questions about this documentation, e-mail <[email protected]>.