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I recently updated my system, which broke... well, everything. I was able to boot, but my init system failed
due to errors creating pipes and no services were launched (I use s6 for my init). After the update,
some preserved libraries failed to be rebuilt by emerge @preserved-rebuild, namely dev-scheme/guile.
The original update was done after adding amd64 and ~amd64 to ACCEPT_KEYWORDS due to difficulties
with various packages.

I cloned the updated system into a separate subvolume, then reverted the original to a backup from
before the update. I tried various things to fix the issue from chroot, including switching to the 17.0
default/hardened profile (#14) from my previous hardened (stable) profile.

I don't know how much (if anything) the broken guile lib has to do with the broken system, but I
can't get any farther until I've sorted this out.

Attached are the relevant logs and debugging outputs.