Ben Gamari <ben@well-typed.com> writes:

...

# Phase 2: Template Haskell

The above story is made considerably messier by `template-haskell`.

...

One further clarification as I fear this may be unclear:

Phase 2 does *not* allow multiple versions of `template-haskell` to
be used with a single GHC. That is, each GHC version will have precisely
one corresponding `template-haskell` version; consequently, programs
using TemplateHaskell's combinator's will still need to adapt to new
`template-haskell` releases when moving to a new GHC.

Phase 3 describes how we could eliminate this need by allowing multiple
`template-haskell` versions to be used with a single GHC release.
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