Clear nix-installer cache before running EC2 bench workflow

Signed-off-by: Hanno Becker <[email protected]>

.github/workflows/bench_ec2_reusable.yml

@@ -44,6 +44,17 @@ jobs:
       label: ${{ steps.start-ec2-runner.outputs.label }}
       ec2-instance-id: ${{ steps.start-ec2-runner.outputs.ec2-instance-id }}
     steps:
+      - name: Clear nix-installer action cache
+        run: |
+          cache_keys=$(gh cache list -R ${{ env.REPO }} -k determinatesystem-nix-installer-aarch64-linux | cut -f 1)
+          echo "Deleting nix-installer caches..."
+          for key in $cache_keys
+          do
+            gh cache -R ${{ env.REPO }} delete $key
+          done
+        env:
+          GH_TOKEN: ${{ secrets.AWS_GITHUB_TOKEN }}
+          REPO: ${{ github.repository }}
       - name: Configure AWS credentials
         uses: aws-actions/configure-aws-credentials@v4
         with: