gexace error with conditional options and clusters

Hi again,

I have the following environment variable GOBO_OS=unix defined in
/etc/profile. In one of my xace files I have some conditional lines,
for example:

<option name="header" value="${SECOM}/library/posix/c"
if="${GOBO_OS}=unix"/>

These don't make it into the compile_ge.xace file unless I remove the
conditional. What's going on?

I vaguely remember this issue, so I'm sorry if this has already been
covered. I think it's something I'm doing wrong, but don't remember
what the fix is.

Thanks,
Brian