With up-to-the-minute pkgsrc (tree head)

# cd /usr/pkgsrc/print/cups
# make fetch
===> [bsd.pkginstall.mk] PKG_USERS must not contain double backslashes.
*** Error code 1

Stop.
make: stopped in /usr/pkgsrc/print/cups


		--Steven M. Bellovin, http://www.cs.columbia.edu/~smb