diff --git a/.gitea/workflows/build-pi-img.yml b/.gitea/workflows/build-pi-img.yml
index 2ba924b..0814bdc 100644
--- a/.gitea/workflows/build-pi-img.yml
+++ b/.gitea/workflows/build-pi-img.yml
@@ -22,6 +22,7 @@ jobs:
           nix_path: nixpkgs=channel:nixos-23.05
       - name: Remove access_tokens
         run: sed -i '/^access-tokens/d' /etc/nix/nix.conf
+      - uses: https://github.com/DeterminateSystems/magic-nix-cache-action@main
       - name: Build image
         run: nix-build '<nixpkgs/nixos>' -A config.system.build.sdImage -I nixos-config=./pi-imgs/pi-initial.nix --argstr system aarch64-linux
       - uses: https://github.com/actions/upload-artifact@v3.1.2