`Language.Haskell.TH.Lib.Internal` exists to provide utility functions for the desugaring of quote syntax. The module header features this line: > This is not a part of the public API, and as such, there are no API guarantees for this module from version to version. In our efforts to stabilise the API of the `template-haskell` package, we should stop exposing this module to users. Such a module is required for our implementation of TH but it should be exposed from a suitably internal package, likely, `ghc-internal`. If a user really wants to depend on this then they should do so via that package, which should make the lack of stability guarantees clearer. I'm proposing putting a deprecation warning on the module for a few releases and then removing it from the `template-haskell` package. I'm not sure if the current comment is equivalent to a deprecation warning, but if we thought so we could just get rid of it right away. See also: - https://gitlab.haskell.org/ghc/ghc/-/issues/24562 - https://gitlab.haskell.org/ghc/ghc/-/issues/24659