diff --git a/.circleci/config.yml b/.circleci/config.yml
index 42feec2dd7..84df7481a2 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -82,6 +82,11 @@ commands:
           when: always
   apply-patches:
     steps:
+      - run:
+          name: Fail if service is previously patched
+          command: |
+            [[ -z $(cat Cargo.lock | grep "\[\[patch.unused\]\]") ]]
+
       - run:
           name: Patch service
           command: |