diff --git a/.github/workflows/kernel-build.yml b/.github/workflows/kernel-build.yml
index 9c757f9..0bbff07 100644
--- a/.github/workflows/kernel-build.yml
+++ b/.github/workflows/kernel-build.yml
@@ -84,7 +84,7 @@ jobs:
       - uses: libbpf/ci/patch-kernel@v1
         with:
           patches-root: '${{ github.workspace }}/ci/diffs'
-          repo-root: '${{ github.workspace }}'
+          repo-root: ${{ env.REPO_ROOT }}
       - name: Setup build environment
         uses: libbpf/ci/setup-build-env@v1
         with:
@@ -116,11 +116,12 @@ jobs:
         name: Build selftests/sched_ext
         uses: theihor/libbpf-ci/build-scx-selftests@build-scx
         with:
+          kbuild-output: ${{ env.KBUILD_OUTPUT }}
+          repo-root: ${{ env.REPO_ROOT }}
           arch: ${{ inputs.arch }}
           toolchain: ${{ inputs.toolchain }}
-          kbuild-output: ${{ env.KBUILD_OUTPUT }}
-          max-make-jobs: 32
           llvm-version: ${{ inputs.llvm-version }}
+          max-make-jobs: 32
       - if: ${{ github.event_name != 'push' }}
         name: Build samples
         uses: libbpf/ci/build-samples@v1