"The program happy is required but it could not be found" after building happy · Issue #157 · commercialhaskell/stack
From running stack build on the stackage-server repo, lts-2.10. happy-1.19.5: build: ERROR Stdout was: Building happy-1.19.5... Preprocessing executable 'happy' for happy-1.19.5... Stderr was: Setu...
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