Lower cabal-version to 3.6 and default-language to GHC2021#434
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Fixes Hackage build matrix failures on GHC < 9.10 (which ships with Cabal < 3.12 and cannot parse cabal-version: 3.12 or recognize GHC2024).
eseliger
approved these changes
Jun 3, 2026
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Hackage's build matrix tries
scip-0.8.0on GHC 9.8.4 and fails before reaching compilation:GHC 9.8.x ships with
Cabal-3.10.x, which understandscabal-versiononly up to3.10. The previouscabal-version: 3.12was required bydefault-language: GHC2024(theGHC2024token was added in Cabal 3.12).Lowering both to the minimum that still supports our usage:
cabal-version: 3.6— minimum version that recognizesdefault-language: GHC2021default-language: GHC2021— supported by GHC 9.2+ and any Cabal ≥ 3.6No source changes needed: the proto-lens-generated modules build cleanly under
GHC2021.cabal checkandcabal buildboth pass locally.This will ship with the next release; the failed
scip-0.8.0build reports on Hackage are cosmetic (users on GHC 9.10+ install fine), so no0.8.0revision is planned.