`CUSTOM` builds are named `UNOFFICIAL`

I am currently making CUSTOM builds of /e/OS rather than UNOFFICIAL builds (because the revert the change that makes it impossible to use Trebuchet as oOme screen app). I build using the /e/ Docker image, and including the line
-e "RELEASE_TYPE=CUSTOM" \ in my docker run command, bit the file produced is named e-1.10-s-20230413-UNOFFICIAL-lilac.zip instead of e-1.10-s-20230413-CUSTOM-lilac.zip

This also happened with the previous e-1.10 build. The e-1.18.1 and previous builds wer correctky named.

My Full build command for the most recent build was

docker run \
  -v "/srv/src:/srv/src" \
  -v "/srv/zips:/srv/zips" \
  -v "/srv/logs:/srv/logs" \
  -v "/srv/cache:/srv/ccache" \
  -v "/srv/keys:/srv/keys" \
  -v "/srv/local_manifests:/srv/local_manifests" \
  -v "/srv/userscripts:/srv/userscripts" \
  -e "BRANCH_NAME=v1.10-s" \
  -e "DEVICE_LIST=lilac" \
  -e "REPO=https://gitlab.e.foundation/e/os/releases.git" \