Hi Dariqq.  Your glib and json bug is indeed different.

Your initial suggestion for a proper fix to the different but similar
troubles we both have:

> I think it would be good if grafts are only applied per output (which 
> might also help resolve #69653).

is the same proposal as in bug#48907.

At https://bugs.gnu.org/48907 Richard Sent wrote:
> One idea I had was to somehow graft each output as a unique derivation
> via repeated calls to graft-derivation. From what I've seen so far
> though that looks much easier said than done. It hasn't progressed
> beyond the "huh, I wonder" phase.

Therefore I will merge the two bugs.

Not entirely sure if this proper fix would currently need changes to the
C++ guix-daemon code.  Anyway, I will not implement it.

Currently we both have workarounds, obviously disabling security updates
with --no-grafts is possible, but also you wrote you can set the
pkgconfig path.  For GTK programs, a workaround is instead of putting

(list gdk-pixbuf
      graphene gtk harfbuzz
      pango)

in your Guix shell manifest or a scheme-file, I could instead rebuild
without grafts, like in Guix’ ungraft manifest.

That is, my previous home configuration for commit
08e0144d2338c8fb51e52e74274554583d0faa69 was: