diff --git a/infra/experimental/chronos/prepare-ccache b/infra/experimental/chronos/prepare-ccache
index e44e1d7cac4b..3b0f56719680 100755
--- a/infra/experimental/chronos/prepare-ccache
+++ b/infra/experimental/chronos/prepare-ccache
@@ -18,5 +18,5 @@
 PROJECT=$1
 {
     echo "COPY ccache-cache/ /ccache/cache";
-    echo "ENV PATH=/ccache/bin:$PATH"
+    echo "ENV PATH=\"/ccache/bin:\$PATH\""
 } >> "projects/$PROJECT/Dockerfile"