On Tue, 28 Mar 2000, John Refling wrote:

> I have created a package makefile which checks if
> X is installed and builds the package one way if
> it isn't installed, and builds it another way (eg
> a few extra binaries) if X is installed.

The body of precedent stands behind making two packages, with the
"xpackage" depending on the plain "package" and installing only the
extra stuff. Ideally, the "X" package would only extract and build the
required bits, but there are a few nasty packages that re-build an
entire distribution, only to install part of it, if you must do that
(coda5-{client,server} comes to mind).