.github/workflows/dist.yml: Save cache earlier

.github/workflows/dist.yml

@@ -197,10 +197,11 @@ jobs:
         with:
           platforms: all
 
-      - name: Cache SAGE_LOCAL
+      - name: Retrieve SAGE_LOCAL cache
+        id: cache-restore
         # useful in particular when running aarch64 repeatedly during development
         # because CIBW_BEFORE_ALL takes ~3000s
-        uses: actions/cache@v4
+        uses: actions/cache/restore@v4
         if: runner.os == 'Linux'
         with:
           path: /sage-*
@@ -251,6 +252,15 @@ jobs:
         run: |
           "${{ steps.python.outputs.python-path }}" -m cibuildwheel unpacked/sagemath*objects*
 
+      - name: Save SAGE_LOCAL cache
+        # We run this after building the first wheel (which builds SAGE_LOCAL in CIBW_BEFORE_ALL)
+        uses: actions/cache/save@v4
+        if: runner.os == 'Linux'
+        with:
+          path: /sage-*
+          key:
+            ${{ steps.cache-restore.outputs.cache-primary-key }}
+
       - name: sagemath-categories
         run: |
           "${{ steps.python.outputs.python-path }}" -m cibuildwheel unpacked/sagemath*categories*