diff --git a/.github/workflows/clang-tidy-differential.yaml b/.github/workflows/clang-tidy-differential.yaml
index 41d722c8e07b0..c52832da7c07e 100644
--- a/.github/workflows/clang-tidy-differential.yaml
+++ b/.github/workflows/clang-tidy-differential.yaml
@@ -65,6 +65,19 @@ jobs:
           echo "::notice::BUILD_TYPE_CUDA_STATE=$build_type_cuda_state"
         shell: bash
 
+      - name: Prepare build_depends.repos file (main branch)
+        if: ${{ github.event.pull_request.base.ref == 'main' }}
+        uses: ./.github/actions/combine-repos-action
+        with:
+          base_file: build_depends_humble.repos
+          overlay_file: build_depends_nightly.repos
+          output_file: build_depends.repos
+
+      - name: Prepare build_depends.repos file (humble branch)
+        if: ${{ github.event.pull_request.base.ref == 'humble' }}
+        run: cp build_depends_humble.repos build_depends.repos
+        shell: bash
+
       - name: Run clang-tidy
         if: ${{ steps.get-changed-files.outputs.changed-files != '' }}
         uses: autowarefoundation/autoware-github-actions/clang-tidy@v1