In your output pkgin-23.8.1nb3 is shown as an upgrade, so it's likely
the "pkgin install" you ran didn't work, and you are running an older
version of pkgin that didn't calculate dependencies correctly.
If you upgrade pkgin first, the output should be better. If not it'll
be a bug that I'd be happy to look at!
I updated pkg_install and pkgin using pkg_add -U, as you suggested. However, something is still off about what it thinks are dependencies:
# pkgin show-full-deps pkgin
full dependency tree for pkgin-23.8.1nb3
p5-File-BaseDir>=0.03
p5-MIME-Charset>=1.006.2
php56-pear-[0-9]*
php>=5.6.40nb9<5.7
php81-ldap>=5.2.12
php81-pear-[0-9]*