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-main-is ⟨thing⟩
-fno-case-folding
-XImplicitParams
-XScopedTypeVariables
-pgmotool ⟨cmd⟩
-fshow-hole-constraints
-Wdeprecations
-O2
-Werror
-Wderiving-typeable
-dppr-user-length
--interactive
-i⟨dir⟩[:⟨dir⟩]*