Hello,
I was installing libffado, I'm on a 64bit cpu architecture but my system is on a 32bit userspace, and it looks like the SConstruct script is not able to determine it, since it wants to use /bin/mount to do it (and in the gentoo sandbox it is not available, AFAIK).
Unfortunally I am not skilled enough to create a patch that correctly detects it, then I'm just editing it for my needs on my local overlay, but you may want to edit the ebuild and write a working patch.
Thanks,
MaurizioB
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