Stopping a Pointless C Compiler Warning

I don't know which upgrade brought this, but currently when I use Build.P=
L
(and the resulting Build files) I get (in reverse video no less) the
message:

It looks like you don't have a C compiler on your PATH, so you will not b=
e
able to compile C or XS extension modules.  You can install GCC from the
MinGW package using the Perl Package Manager by running:

    ppm install MinGW

I've become somewhat numb to it, but it's a completely pointless and
unhelpful message, since this machine I'm working on will never develop
anything in C. I haven't been able to find anything in Module::Build
documentation that tells me how to tell it that this is a pure Perl
module. Can anyone steer me in the right direction?

I'm using ActiveState perl version 5.14.1, and Module::Build version 0.38=
00.

Thanks,
     -john