I got the man command working by just symlinking executable in /opt/myfiles/usr/lib/man-db/man to /opt/myfiles/usr/bin/man.
It's a shame that it was not present after unpacking the deb. I wonder why nokia added this package in their repo in the first place, since it conflicts with busybox.
Anyway the man command is working.. But unfortunately without the manuals.

Manpath should fix this. However I have no idea what to do next.

make another symlinks to the other non-binary folders or just edit the manpath.config file?