fix

Author: marcoieni

src/ci/docker/run.sh

@@ -106,7 +106,7 @@ if [ -f "$docker_dir/$image/Dockerfile" ]; then
     CACHE_IMAGE_TAG=${REGISTRY}/${REGISTRY_USERNAME}/rust-ci-cache:${cksum}
 
     # Docker build arguments.
-    build_args="build --rm -t rust-ci -f \"$dockerfile\" \"$context\""
+    build_args="build --rm -t rust-ci -f $dockerfile $context"
 
     # If the environment variable SCRIPT is defined,
     # set the build argument SCRIPT_ARG to SCRIPT.