diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 830c2abb..5f0e7e15 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -22,6 +22,12 @@ jobs:
           path: pantry
           repository: teaxyz/pantry.core
 
+      - name: co extra
+        uses: actions/checkout@v3
+        with:
+          path: extra
+          repository: teaxyz/pantry.extra
+
       - uses: teaxyz/setup@v0
         with:
           # necessary because we currently require a `.git` directory
@@ -29,6 +35,8 @@ jobs:
 
       - run: ./scripts/check-core-sizes.ts ${{ inputs.projects }}
         working-directory: pantry
+        env:
+          TEA_PANTRY_PATH: ${{ env.TEA_PANTRY_PATH }}:${{ github.workspace }}/extra
 
   build:
     runs-on: ${{ matrix.platform.os }}