diff --git a/.harness/firebase-deploy.yaml b/.harness/firebase-deploy.yaml
index 2f82368..b2f5a33 100644
--- a/.harness/firebase-deploy.yaml
+++ b/.harness/firebase-deploy.yaml
@@ -17,11 +17,12 @@ spec:
           container: alpine/git
           shell: sh
           script: |
-            echo build.event = ${{ build.event }}
-            echo build.target = ${{ build.target }}
-            echo build.before = ${{ build.before }}
-            echo build.after = ${{ build.after }}
-            git --no-pager diff --name-only ${{ build.before }}..${{ build.after }}
+            export build_event=${{ build.event }}
+            export build_target=${{ build.target }}
+            export build_before=${{ build.before }}
+            export build_after=${{ build.after }}
+            env | grep ^build_
+            git --no-pager diff --name-only $build_before..$build_after
       - name: dind
         type: background
         spec: