GHC panic in CI job (initDs)

I'm getting the following panic on a CI job. It turned up after a rebase and the MR is quite small and just adds a new stat to GHC.Stats, so, it's quite likely that this panic is being caused by something intermittent or something recently introduced on master.

GHC error in desugarer lookup in Data.IntSet.Internal:
  Failed to load interface for ‘Language.Haskell.TH.Lib.Internal’
  Perhaps you haven't installed the profiling libraries for package ‘template-haskell’?
  Use -v (or `:set -v` in ghci) to see a list of the files searched for.
ghc: panic! (the 'impossible' happened)
  GHC version 9.5.20220920:
	initDs

You can see the full job log here: https://gitlab.haskell.org/teo/ghc/-/jobs/1177427