untrusted comment: verify with openbsd-77-base.pub
RWSbCCUoGpcxVVe6pvM9/Xsa6gVWTsI4e+Soax+NPz99kVJ63QVXkpup9GHkzLAaIKVh3Pk+LcdmuZ1danpkibUJeACi6jdeFAw=

OpenBSD 7.7 errata 027, March 10, 2026:

Stop userland from using pledge(2) "tmppath" because the kernel feature
has been removed.

Apply by doing:
    This errata does not need source modifications.

And then rebuild and install calendar:
    cd /usr/src/usr.bin/calendar
    make obj
    make
    make install