gistfile1.txt

$ nix run nixpkgs.perl -c perl -E '1'
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
	LANGUAGE = "en_US:en",
	LC_ALL = (unset),
	LC_ADDRESS = "en_US.UTF-8",
	LC_NAME = "en_US.UTF-8",
	LC_MONETARY = "en_US.UTF-8",
	LC_PAPER = "en_US.UTF-8",
	LC_IDENTIFICATION = "en_US.UTF-8",
	LC_TELEPHONE = "en_US.UTF-8",
	LC_MEASUREMENT = "en_US.UTF-8",
	LC_TIME = "en_US.UTF-8",
	LC_NUMERIC = "en_US.UTF-8",
	LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
$ nix run nixpkgs.perl -c env LC_ALL=C.UTF-8 perl -E '1'
$