perl: warning: Setting locale failed.

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
	LANGUAGE = (unset),
	LC_ALL = (unset),
	LC_CTYPE = "UTF-8",
	LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

export LANG=en_US.UTF-8
export LANGUAGE=en_US.UTF-8
export LC_COLLATE=C
export LC_CTYPE=en_US.UTF-8