tiv() {
        if use_colour; then
            if type nix > /dev/null; then
                nix run github:sfrijters/nixpkgs/tiv-add-wrapper#tiv -- "$@"
            elif type tiv >/dev/null; then
                tiv "$@"
            else
                echo "tiv command not found"
                return 1
            fi
        fi
    }

* `tiv`: Wrapper around [tiv](https://github.com/stefanhaustein/TerminalImageViewer).

x tiv "${dir}/../data/589b561082250818d81e7490.png"