diff --git a/coin/instructions/debian/debian_build_module.yaml b/coin/instructions/debian/debian_build_module.yaml
index 7e50a153602..f4faeeca746 100644
--- a/coin/instructions/debian/debian_build_module.yaml
+++ b/coin/instructions/debian/debian_build_module.yaml
@@ -39,7 +39,7 @@ instructions:
       env_var:  COIN_SKIP_DEBIAN
       contains_value: "MISSING_DEBIAN_INST"
   - type: ExecuteCommand
-    command: "git checkout {{.Env.DEBIAN_RULES_REF}"
+    command: "git checkout {{.Env.DEBIAN_RULES_REF}}"
     maxTimeInSeconds: 900
     maxTimeBetweenOutput: 900
     userMessageOnFailure: "Failed to checkout debian rules branch"