[Fedora-livecd-list] [PATCH] Don't let a nonstandard TMPDIR setting cause malfunction.

[Jim Meyering]

In http://thread.gmane.org/gmane.linux.redhat.fedora.livecd/1222,
[Re: [Fedora-livecd-list] livecd-creator fails with $TMPDIR not in build root]
I reported this failure:

Jim Meyering <jim at meyering.net> wrote:
> I've been experimenting with livecd-creator and my first
> run failed because I had TMPDIR=/t/jt7300.Wu7340.
> [btw, this is on rawhide x86_64, with latest cloned from git]
...

Here's a patch: