diff --git a/.github/workflows/execute-notebook.yml b/.github/workflows/execute-notebook.yml
index 953f34b72..837c58ada 100644
--- a/.github/workflows/execute-notebook.yml
+++ b/.github/workflows/execute-notebook.yml
@@ -13,6 +13,8 @@ concurrency:
   group: execute-notebook-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  SGLANG_IS_IN_CI: true
 
 jobs:
   run-all-notebooks:
diff --git a/.github/workflows/release-docs.yml b/.github/workflows/release-docs.yml
index fc725d88b..bfacfb39a 100644
--- a/.github/workflows/release-docs.yml
+++ b/.github/workflows/release-docs.yml
@@ -14,6 +14,9 @@ concurrency:
   group: release-docs-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  SGLANG_IS_IN_CI: true
+
 jobs:
   execute-and-deploy:
     runs-on: 1-gpu-runner