Exporting ARCH to pbuilder through pdebuild?

["Todd A. Jacobs" <nospam@codegnome.org>]

I have some configurations inside of my ~/.pbuilderrc that depend on the
value of ARCH in the environment. However, if I call pbuilder through
pdebuild, it doesn't seem to be picking up the ARCH environment
variable.

Currently, I'm calling it like so:

    export ARCH=i386
    pdebuild --auto-debsign --buildresult /tmp/$(basename $PWD) \
	--debsign-k 0xABCDEFGH

but pbuilder doesn't pick it up here:

    : ${ARCH:="$(dpkg --print-architecture)"}

How can I ensure that pdebuild is passing on the right architecture to
pbuilder?

-- 
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	-- Doctor Who, "Destiny of the Daleks"