Actually, Ottavio was correct: bootstrapping pkgsrc with "$ ./bootstrap --unprivileged --prefix=/opt/packages --prefer-pkgsrc=yes" works, but the compilation now stops with a PLIST error on "expat":
=> Automatic manual page handling
=> Generating post-install file lists
=> Checking file-check results for expat-2.2.8
ERROR: ************************************************************
ERROR: The following files are in /opt/pkgsrc/pkgsrc/textproc/expat/work/.destdir/opt/packages but not in the PLIST:
ERROR: /opt/pkgsrc/pkgsrc/textproc/expat/work/.destdir/opt/packages/man/man1/xmlwf.1
*** Error code 1
Stop.
bmake[3]: stopped in /opt/pkgsrc/pkgsrc/textproc/expat
*** Error code 1
Any help on this one?
Many thanks in advance!
-- N.