diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 4406eed..5ec1568 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,10 +10,10 @@ jobs:
   test:
     runs-on: ubuntu-20.04
     steps:
-    - name: Dump GitHub context
-      env:
-        GITHUB_CONTEXT: ${{ toJson(github) }}
-      run: echo "$GITHUB_CONTEXT"
+    - name: View context attributes
+      uses: actions/github-script@v6
+      with:
+        script: console.log(JSON.stringify(context, null, 2))
     - name: Translate Repo Name For Build Tools filename_prefix
       id: repo-name
       run: |
@@ -55,7 +55,7 @@ jobs:
     - name: Clone and build circuitpython unix port
       run: |
         set -e
-        [ -e circuitpython/py/py.mk ] || git clone --depth=1 https://github.com/adafruit/circuitpython
+        [ -e circuitpython/py/py.mk ] || (git clone --depth=1 https://github.com/adafruit/circuitpython && cd circuitpython && git fetch --tags --recurse-submodules=no --shallow-since="2021-07-01" https://github.com/adafruit/circuitpython HEAD)
         [ -e circuitpython/lib/libffi/autogen.sh ] || (cd circuitpython && git submodule update --init lib/libffi lib/axtls lib/berkeley-db-1.xx tools/huffman lib/uzlib extmod/ulab)
         [ -x circuitpython/ports/unix/micropython ] || (
             make -C circuitpython/mpy-cross -j$(nproc)