Shellckeck found errors in one or more shellscripts provided by games-strategy/defcon-demo. Kindly refer to the findings below and the shellcheck wiki for further details: ------------------------------------------------ script: /usr/portage/games-strategy/defcon-demo/files/defcon:2 if [ -n "GAMEDIR/lib" ] ; then ^^^^^^^^^^^ error: Argument to -n is always true due to literal strings. (https://github.com/koalaman/shellcheck/wiki/SC2157) This is an automated bug report. Conservative settings were used to minimize false-positives but there's still a chance that the above list contains non-issues. Running shellcheck again with default settings could detect other possible issues. References: [1] this script: https://github.com/heeplr/gentoo-shellbug [2] shellcheck: https://www.shellcheck.net/