variablePrefix ++ "_HC_OPTS = " ++ escape (unwords
( programDefaultArgs ghcProg
++ hcOptions GHC bi
- ++ extensionsToFlags (compiler lbi) (extensions bi)
+ ++ extensionsToFlags (compiler lbi) (usedExtensions bi)
++ programOverrideArgs ghcProg)),
variablePrefix ++ "_CC_OPTS = " ++ unwords (ccOptions bi),
variablePrefix ++ "_CPP_OPTS = " ++ unwords (cppOptions bi),