doesExecutableExist :: (MonadIO m)
  => EnvOverride       -- ^ How to override environment
  -> String            -- ^ Name of executable
  -> m Bool
doesExecutableExist menv name = liftM isJust $ findExecutable menv name
doesExecutableExist :: (MonadIO m)
  => EnvOverride       -- ^ How to override environment
  -> String            -- ^ Name of executable
  -> m Bool
doesExecutableExist menv name = liftM isJust $ findExecutable menv name
doesExecutableExist menv name = liftM isJust $ findExecutable menv name