diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index 612b0c336..95e3e5cc2 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -278,6 +278,43 @@ jobs:
         with:
           node-version: 12
 
+      # Upload things so we can download it and compare to fix the bug:
+      # can't find crate for `prost_derive` which `prost_build` - https://github.com/ankitects/anki/pull/729
+      - name: Upload pyenv
+        if: matrix.os == 'macos-latest' && matrix.BUILD_TYPE == 'check'
+        uses: actions/upload-artifact@v2
+        with:
+          name: ${{ matrix.os }}-pyenv
+          path: ${{ github.workspace }}${{ matrix.SEP }}pyenv
+
+      - name: Upload index
+        if: matrix.os == 'macos-latest' && matrix.BUILD_TYPE == 'check'
+        uses: actions/upload-artifact@v2
+        with:
+          name: ${{ matrix.os }}-index
+          path: ${{ matrix.CARGO_INDEX_DIR }}
+
+      - name: Upload registry
+        if: matrix.os == 'macos-latest' && matrix.BUILD_TYPE == 'check'
+        uses: actions/upload-artifact@v2
+        with:
+          name: ${{ matrix.os }}-registry
+          path: ${{ matrix.CARGO_REGISTRY_DIR }}
+
+      - name: Upload rslib
+        if: matrix.os == 'macos-latest' && matrix.BUILD_TYPE == 'check'
+        uses: actions/upload-artifact@v2
+        with:
+          name: ${{ matrix.os }}-rslib
+          path: ${{ github.workspace }}${{ matrix.SEP }}rslib${{ matrix.SEP }}target
+
+      - name: Upload rspy
+        if: matrix.os == 'macos-latest' && matrix.BUILD_TYPE == 'check'
+        uses: actions/upload-artifact@v2
+        with:
+          name: ${{ matrix.os }}-rspy
+          path: ${{ github.workspace }}${{ matrix.SEP }}rspy${{ matrix.SEP }}target
+
       - run: make develop
         if: matrix.BUILD_TYPE == 'build'