=> Bootstrap dependency digest>=20010302: found digest-20190127
=> Checksum SHA1 OK for swi-prolog/swipl-8.0.2.tar.gz
=> Checksum RMD160 OK for swi-prolog/swipl-8.0.2.tar.gz
=> Checksum SHA512 OK for swi-prolog/swipl-8.0.2.tar.gz
mkdir: /tmp/pkgbuild/lang/swi-prolog-packages: Permission denied
*** Error code 1

Stop.
make: stopped in /usr/pkgsrc/lang/swi-prolog-packages