I spent AGES trying to get pkgsrc to work as the package manager. It does NOT build in Yocto. I TAKE BACK EVERYTHING GOOD I SAID ABOUT PKGSRC THE BUILD SYSTEM IS SO SHIT AND IT DOESNT WORK AND IT USES NON STANDARD BUILD AND AAAAHHHHHHHHHHHHHHHHHHHHHH
REST IN PISS PKGSRC YOU WILL NOT BE MISSED

I ended up using DNF/RPM (yes, the package manager from Fedora!)

You will see in the screenshot below that DNF is failing to update repos, that’s because I kind of forgot to get networking working before trying the package manager (also using Fedora repo just for testing, will not be in final one)