-- Set source_unchanged to False unconditionally if
-- (a) recompilation checker is off, or
-- (b) we aren't going all the way to .o file (e.g. ghc -S)
-- Set source_unchanged to False unconditionally if
-- (a) recompilation checker is off, or
-- (b) we aren't going all the way to .o file (e.g. ghc -S)