[f2py] gfortran instead of g77

I've used F2py for a couple of years with MinGW, but now, on a new 
machine with a new compiler set, I haven't been able to build any 
extension modules, as F2py searches for g77/f77 or g90/f90 -- my current 
MinGW setup comes with gfortran. I have FC_VENDOR set to gnu, but F2py 
still fails. Is there a relatively easy workaround for this?

Thanks,
A. Cogbill