Setup Haskell

Version updated for https://github.com/haskell-actions/setup to version v2.8.0.

  • This action is used across all versions by 2,291 repositories.

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Release notes

Remove apt (ppa:hvr) fallback install method

This PR replicates https://github.com/haskell/actions/pull/138 by Bodigrim.

For recent Ubuntu (> 20.04) the PPA hvr does not provide any GHC releases, so this install method is now dead.

What’s Changed

Full Changelog: https://github.com/haskell-actions/setup/compare/v2.7...v2.8.0