Haskell

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GHC9.x Install on M1 mac Preqs: brew install llvm@13 Add to path export PATH="/opt/homebrew/opt/llvm@13/bin:$PATH" Install via GHCup Fix ffitarget_arm64.h not found on M1 Mac fatal error: 'ffitarget_arm64.h' file not found Fix: C_INCLUDE_PATH="`xcrun --show-sdk-path`/usr/include/ffi" stack build --fast --pedantic See also issue 20592

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