A fix for the bug reported in https://bugs.freedesktop.org/show_bug.cgi?id=5898 needs to be integrated into the 6.9.x branch. The fix used in modular would need to be adapted to either always use /dev/null or add a HasMktempCommand definition to the Imake configs for the various platforms and key off that.
Sorry about the phenomenal bug spam, guys. Adding xorg-team@ to the QA contact so bugs don't get lost in future.
Clearly, 6.9.x branch fixes are not going to happen at this point.
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