diff --git a/.github/actions/setup-nix/action.yaml b/.github/actions/setup-nix/action.yaml
index 54a3b9f7e1..213ef28864 100644
--- a/.github/actions/setup-nix/action.yaml
+++ b/.github/actions/setup-nix/action.yaml
@@ -19,6 +19,8 @@ runs:
         name: postgrest
         authToken: ${{ inputs.authToken }}
     - uses: DeterminateSystems/magic-nix-cache-action@main
+      with:
+        upstream-cache: "https://postgrest.cachix.org"
     - if: ${{ inputs.tools }}
       run: nix-env -f default.nix -iA ${{ inputs.tools }}
       shell: bash