According to the FHS, /usr/local/share/man is the correct man page path
in this projects's case. Set this to default in config.mk.

d-flag: There's no need for that, use the &-operator or fork+exec in a
        non-shell-context. In the latter case you get the PID for free.
v-flag: If you want to find out which version of a package is installed,
        consult your package manager. That's his job.