diff --git a/run.sh b/run.sh
index 1b613a8..c370c77 100755
--- a/run.sh
+++ b/run.sh
@@ -2,9 +2,15 @@
 # Build a nightly using the helper Docker container.
 set -euo pipefail
 
-docker buildx build -t git.rgst.io/jaredallard/citron-nightly-builder --load .
+IMAGE="git.rgst.io/jaredallard/citron-nightly-builder"
 
-container_id=$(docker run --rm --detach --init --volume "citron-nightly-src:/src/citron-nightly" git.rgst.io/jaredallard/citron-nightly-builder sleep infinity)
+if [[ "$CI" != "true" ]]; then
+  docker buildx build -t "$IMAGE" --load .
+else
+  docker pull "$IMAGE"
+fi
+
+container_id=$(docker run --rm --detach --init --volume "citron-nightly-src:/src/citron-nightly" "$IMAGE" sleep infinity)
 trap 'docker stop ${container_id}' EXIT
 
 echo "Using $container_id"