stack setup supports installing GHC for macOS aarch64 (M1)

Author: borsboom

ChangeLog.md

@@ -13,6 +13,8 @@ Behavior changes:
 
 Other enhancements:
 
+* `stack setup` supports installing GHC for macOS aarch64 (M1)
+
 Bug fixes:
 
 * Ensure that `extra-path` works for case-insensitive `PATH`s on Windows.

src/Stack/Setup.hs

@@ -1266,6 +1266,7 @@ getOSKey platform =
         Platform Arm                   Cabal.Linux   -> return "linux-armv7"
         Platform AArch64               Cabal.Linux   -> return "linux-aarch64"
         Platform Sparc                 Cabal.Linux   -> return "linux-sparc"
+        Platform AArch64               Cabal.OSX     -> return "macosx-aarch64"
         Platform arch os -> throwM $ UnsupportedSetupCombo os arch
 
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