Allow -P to install from freebsd-base(7) pkgbase packages, which is now the default. Setting NANO_NOPKGBASE falls back to legacy distribution sets. Document behavior in nanobsd(8).
Run pkg(8) directly against NANO_WORLDDIR with explicit ABI and OSVERSION overrides.
Install every pkg repo fingerprint from the source tree share/keys directory instead of a single hardcoded fingerprint heredoc.
Account for different precompiled kernel packages when configuring kernel names.