{
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  "path": "/t/ghc-9-12-4-rc1-is-now-available/13786#post_5",
  "publishedAt": "2026-03-13T17:51:00.000Z",
  "site": "https://discourse.haskell.org",
  "tags": [
    "@hasufell"
  ],
  "textContent": "I second @hasufell’s appeal for more eyes on the RC releases. If you want to use with Stack:\n\nAdd a `setup-info` dictionary to a configuration file with the applicable entry for your operating system. For example, on Windows or macOS/AArch64, a `stack.yaml`:\n\n\n    snapshot: nightly-2026-03-13 # GHC 9.12.3\n    compiler: ghc-9.12.3.20260311\n    compiler-check: match-exact # Anticipating future rc releases\n\n    # Only required before the GHC version has been installed:\n    setup-info:\n      ghc:\n        windows64:\n          9.12.3.20260311:\n            url: https://downloads.haskell.org/ghc/9.12.4-rc1/ghc-9.12.3.20260311-x86_64-unknown-mingw32.tar.xz\n            # Can be extended with SHA protections etc: see https://docs.haskellstack.org/en/stable/configure/yaml/non-project/#setup-info\n        macosx-aarch64:\n          9.12.3.20260311:\n            url: https://downloads.haskell.org/ghc/9.12.4-rc1/ghc-9.12.3.20260311-aarch64-apple-darwin.tar.bz2\n            # Can be extended with SHA protections etc: see https://docs.haskellstack.org/en/stable/configure/yaml/non-project/#setup-info\n\n",
  "title": "GHC 9.12.4-rc1 is now available"
}