pkg-2.4.1 broken?

# pkg delete -f pkg
...
# ../pkg-static add pkg-2.4.1.pkg
pkg-static: pkg-2.4.1.pkg is not a valid package: no manifest found

This is on 14.3-RELEASE/amd64. pkg-2.4.1.pkg was created on a different 
machine using 'pkg create pkg-2.4.1' after upgrading pkg from 2.3.1_1 to 
2.4.1 using portmaster. pkg-static is also copied from that machine.

I can still install pkg-2.3.1_1.pkg with the same pkg-static. I only get:

pkg: warning: database version 37 is newer than libpkg(3) version 36, 
but still compatible

Besides that warning, everything seems to work with pkg-2.3.1_1.

I know that portmaster is not really recommended anymore and using 
pkg-static to install pkg is probably not the best way, either. Anyhow, 
it used to work and it should work from my understanding.

Best,
Jan Henrik