src/ci/docker/run.sh

@@ -86,19 +86,13 @@ if [ -f "$docker_dir/$image/Dockerfile" ]; then
     echo "::group::Building docker image for $image"
     echo "Image checksum ${cksum}"
 
-    docker buildx create --use --driver docker-container
+    # On PR jobs, we don't have permissions to write to the cache, so we should not use `docker login` nor caching.
     if [ "$PR_CI_JOB" -eq 1 ]
     then
-        retry docker \
-              buildx \
-              build \
-              --rm \
-              -t rust-ci \
-              -f "$dockerfile" \
-              --cache-from type=registry,ref=ghcr.io/rust-lang-ci/rust-ci:${cksum} \
-              --output=type=docker \
-              "$context"
+        retry docker build --rm -t rust-ci -f "$dockerfile" "$context"
     else
+        docker buildx create --use --driver docker-container
+
         # Login to Docker registry
         echo ${DOCKER_TOKEN} | docker login ghcr.io --username rust-lang-ci --password-stdin
         retry docker \