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Exclude deriving-trans#32

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tbidne merged 1 commit intohaskell:masterfrom
tbidne:exclude-deriving-trans
Apr 10, 2026
Merged

Exclude deriving-trans#32
tbidne merged 1 commit intohaskell:masterfrom
tbidne:exclude-deriving-trans

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@tbidne tbidne commented Apr 10, 2026

The deriving-trans-0.11.0.0 package was just added to the latest nightly. Unfortunately, this package is only compatible with the latest mtl-2.3.2, not any minor versions below it. This is fine for stackage and if your GHC is 9.12.4, but it's not fine for older GHCs (e.g. CI's 9.12.2), which is a problem since we try to be compatible with multiple minors.

Since:

  1. deriving-trans doesn't seem to have any reverse deps.
  2. IMO it's not feasible to try to handle packages that do not work across boot package minor ranges.

It seems best to exclude deriving-trans for now.

@tbidne tbidne merged commit 9fa62fc into haskell:master Apr 10, 2026
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@tbidne tbidne deleted the exclude-deriving-trans branch April 10, 2026 05:02
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