Downgrade back to lts-22.6

Author: chreekat

stack.yaml

@@ -1,4 +1,8 @@
-resolver: lts-22.43
+# As this is built on NixOS stable, it has to stay on a GHC that exists on the
+# OS.
+# I.e. changes here need to be synced with changes to
+# https://github.com/haskellfoundation/hf-infrastructure
+resolver: lts-22.6
 extra-deps:
 # WARNING: Changing the hoogle version causes stackage-server-cron to regenerate
 # Hoogle databases FOR EVERY SNAPSHOT, EVER. Usually, that's ok! But don't