diff --git a/.github/scripts/tar-artifact.sh b/.github/scripts/tar-artifact.sh
index 133151c..8f9b813 100644
--- a/.github/scripts/tar-artifact.sh
+++ b/.github/scripts/tar-artifact.sh
@@ -13,7 +13,6 @@ fi
 
 arch="${1}"
 toolchain="${2}"
-archive_make_helpers="${3:-0}"
 
 # Convert a platform (as returned by uname -m) to the kernel
 # arch (as expected by ARCH= env).
@@ -74,7 +73,7 @@ for file in "${kbuild_output_file_list[@]}"; do
 done
 
 additional_file_list=()
-if [ $archive_make_helpers -ne 0 ]; then
+if [[ -n "${ARCHIVE_MAKE_HELPERS}" ]]; then
   # Package up a bunch of additional infrastructure to support running
   # 'make kernelrelease' and bpf tool checks later on.
   mapfile -t additional_file_list < <(find . -iname Makefile)
@@ -86,6 +85,11 @@ if [ $archive_make_helpers -ne 0 ]; then
   )
 fi
 
+mkdir -p selftests
+cp -r tools/testing/selftests/bpf selftests
+if [[ -n "${BUILD_SCHED_EXT_SELFTESTS}" ]]; then
+  cp -r tools/testing/selftests/sched_ext selftests
+fi
 
 tar -cf - \
     kbuild-output \
@@ -94,7 +98,7 @@ tar -cf - \
     --exclude '*.d'                    \
     --exclude '*.h'                    \
     --exclude '*.output'               \
-    selftests/bpf/                     \
+    selftests/                         \
   | zstd -T0 -19 -o "vmlinux-${arch}-${toolchain}.tar.zst"
 
 # Cleanup and restore the original KBUILD_OUTPUT
diff --git a/.github/workflows/kernel-build.yml b/.github/workflows/kernel-build.yml
index aafb908..7925531 100644
--- a/.github/workflows/kernel-build.yml
+++ b/.github/workflows/kernel-build.yml
@@ -45,7 +45,7 @@ jobs:
     runs-on: ${{ fromJSON(inputs.runs_on) }}
     timeout-minutes: 100
     env:
-        ARCHIVE_MAKE_HELPERS: ${{ github.repository != 'kernel-patches/bpf' && '1' || '0' }}
+        ARCHIVE_MAKE_HELPERS: ${{ github.repository != 'kernel-patches/bpf' && 'true' || '' }}
         KERNEL: ${{ inputs.kernel }}
         REPO_ROOT: ${{ github.workspace }}
         REPO_PATH: ""
@@ -55,6 +55,7 @@ jobs:
               || github.base_ref
               || 'bpf-next'
           }}
+        BUILD_SCHED_EXT_SELFTESTS: ${{ inputs.arch == 'x86_64' || inputs.arch == 'aarch64' && 'true' || '' }}
     steps:
       - uses: actions/checkout@v4
         # We fetch an actual bit of history here to facilitate incremental
@@ -83,22 +84,30 @@ jobs:
       - uses: libbpf/ci/patch-kernel@v1
         with:
           patches-root: '${{ 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:
           arch: ${{ inputs.arch }}
           llvm-version: ${{ inputs.llvm-version }}
           pahole: c2f89dab3f2b0ebb53bab3ed8be32f41cb743c37
+      - name: Print toolchain version used
+        shell: bash
+        run: |
+          TOOLCHAIN=${{ inputs.toolchain }}
+          if [ $TOOLCHAIN = "llvm" ]; then
+            TOOLCHAIN="clang-${{ inputs.llvm-version }}"
+          fi
+          ${TOOLCHAIN} --version
       - name: Build kernel image
-        uses: libbpf/ci/build-linux@v1
+        uses: theihor/libbpf-ci/build-linux@build-scx
         with:
           arch: ${{ inputs.arch }}
           toolchain: ${{ inputs.toolchain }}
           kbuild-output: ${{ env.KBUILD_OUTPUT }}
           max-make-jobs: 32
           llvm-version: ${{ inputs.llvm-version }}
-      - name: Build selftests
+      - name: Build selftests/bpf
         uses: libbpf/ci/build-selftests@v1
         with:
           arch: ${{ inputs.arch }}
@@ -111,6 +120,16 @@ jobs:
           # RELEASE=0 adds -O0 make flag
           # RELEASE=1 adds -O2 make flag
           RELEASE: ${{ inputs.release && '1' || '' }}
+      - if: ${{ env.BUILD_SCHED_EXT_SELFTESTS }}
+        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 }}
+          llvm-version: ${{ inputs.llvm-version }}
+          max-make-jobs: 32
       - if: ${{ github.event_name != 'push' }}
         name: Build samples
         uses: libbpf/ci/build-samples@v1
@@ -123,7 +142,7 @@ jobs:
       - name: Tar artifacts
         working-directory: ${{ env.REPO_ROOT }}
         run: |
-          bash .github/scripts/tar-artifact.sh ${{ inputs.arch }} ${{ inputs.toolchain_full }} ${{ env.ARCHIVE_MAKE_HELPERS }}
+          bash .github/scripts/tar-artifact.sh ${{ inputs.arch }} ${{ inputs.toolchain_full }}
       - if: ${{ github.event_name != 'push' }}
         name: Remove KBUILD_OUTPUT content
         shell: bash