[9fans] Inferno on Plan9

[G B]

I've installed Inferno on FreeBSD but how do you build it for Plan 9?  The 
makemk.sh file and without looking, I think the mkconfig file too, reference 
gcc.  And the makemk.sh has /bin/sh.  Do I have to install a Bourne or Korn 
shell plus gcc from contrib to compile?
Thanks.