pkg_add: Missing required library: /pkg/2024Q4/gcc10//lib/./libgcc_s.so.1

[Taylor R Campbell <riastradh%NetBSD.org@localhost>]

In my bulk build on 2024Q4, various packages are failing in the
depends stage with this log output:

pkg_add: Missing required library: /pkg/2024Q4/gcc10//lib/./libgcc_s.so.1
pkg_add: Missing required library: /pkg/2024Q4/gcc10//lib/./libquadmath.so.0
pkg_add: Missing required library: /pkg/2024Q4/gcc10//lib/./libstdc++.so.7
pkg_add: Can't install dependency gcc10-libs>=10.2.0
pkg_add: Expected dependency gcc10-libs>=10.2.0 still missing

I thought someone had committed a workaround for this, pending a
proper fix for the gcc-libs packages, but I lost track of that thread.

What's the deal with it?  How do I make the bulk build work?