Firstly, make generally appears in /usr/bin true, however, on most
systems /usr/bin/make is not GNU make, which is what GNUstep needs. It
may be called 'gmake' and live in /usr/local/bin, /foo/bar or whatever.
One should never assume a given program is available on every system.
You completely missed his point. What he was saying is that it
doesnt move on a given system. If it's in /usr/local/bin/gmake today
it will also be there tomorrow! So you should set it per-system rather
than per-project, because the location of make is *system* specific
rather than *project* specific.