/usr/lib/openarena-server/oacmp-mod is in openarena-oacmp1 3-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/openarena-server/../../share/games/openarena/oacmp-mod
/usr/lib/openarena-server/../../share/games/openarena/oacmp-mod