Haskell shell broke itself?

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Based on https://gist.github.com/lsmor/bb632565cd96be9da589b6e91f80f9ba:

  1. Disallow stack from downloading its own ghc by adding system-ghc: true to the stack.yaml
  2. Explicitly select the stackage snapshot that corresponds with the desired ghc version (in this case, per https://www.stackage.org, LTS 22.43 matches ghc-9.6.6).

The resulting stack.yaml:

snapshot:
  url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/22/43.yaml

packages: []

system-ghc: true

Just in case, I also deleted ~/.stack.
Then ran stack update to update the lockfile.

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