package using fmt -w

[Brook Milligan <brook%nmsu.edu@localhost>]

I am building a package that uses 'fmt -w' in the configure script and
elsewhere.  NetBSD's fmt does not take the '-w' options although
textproc/heirloom-fmt does.  I have made heirloom-fmt a dependency for
my package (both with BUILD_DEPENDS and buildlink) but the build is
finding the native fmt instead.

What is the best way to make the package use a non-native fmt?

Thanks for your help.

Cheers,
Brook