diff --git a/scripts/render-compose.sh b/scripts/render-compose.sh
index d7b692c..4668612 100644
--- a/scripts/render-compose.sh
+++ b/scripts/render-compose.sh
@@ -2,7 +2,6 @@
 set -euo pipefail
 
 WORKDIR="${WORKDIR:-$PWD/work/opencloud-compose}"
-MIRROR_URL="${MIRROR_URL:?set MIRROR_URL}"
 ROOT="${PWD}"
 
 python3 "$ROOT/scripts/patch-weboffice-collabora-yaml.py" "$WORKDIR/weboffice/collabora.yml"
\ No newline at end of file