diff --git a/.github/workflows/dev-build.yml b/.github/workflows/dev-build.yml
index 1f42e14..73909eb 100644
--- a/.github/workflows/dev-build.yml
+++ b/.github/workflows/dev-build.yml
@@ -70,6 +70,7 @@ jobs:
       drivers: ${{ steps.detect.outputs.drivers }}
       has_changes: ${{ steps.detect.outputs.has_changes }}
       release_source: ${{ steps.detect.outputs.release_source }}
+      compare_base: ${{ steps.detect.outputs.compare_base }}
       source_commit: ${{ steps.published_source.outputs.source_commit }}
       has_manifest: ${{ steps.published_source.outputs.has_manifest }}
     steps:
@@ -184,6 +185,7 @@ jobs:
             fi
           fi
           echo "drivers=${DRIVERS}" >> "$GITHUB_OUTPUT"
+          echo "compare_base=${BASE_REF}" >> "$GITHUB_OUTPUT"
           if [ -n "$DRIVERS" ]; then
             echo "has_changes=true" >> "$GITHUB_OUTPUT"
             echo "🧭 Changed driver agents: $DRIVERS"
@@ -448,11 +450,11 @@ jobs:
         shell: bash
         run: |
           set -euo pipefail
-          BASE_REF="${{ needs.driver_agents.outputs.source_commit }}"
+          BASE_REF="${{ needs.driver_agents.outputs.compare_base }}"
           FALLBACK_DRIVERS="${{ needs.driver_agents.outputs.drivers }}"
 
-          if [[ -z "$BASE_REF" ]]; then
-            echo "⚠️ 未拿到已发布 driver release 源码提交，回退使用全局检测结果：${FALLBACK_DRIVERS}"
+          if [[ -z "$BASE_REF" || "$BASE_REF" == "all" ]]; then
+            echo "⚠️ 当前 driver 检测基线不可做平台 diff，回退使用全局检测结果：${FALLBACK_DRIVERS}"
             echo "drivers=${FALLBACK_DRIVERS}" >> "$GITHUB_OUTPUT"
           else
             echo "🧭 对比当前平台 revision：base=${BASE_REF} head=${GITHUB_SHA} platform=${{ matrix.platform }}"