diff --git a/.forgejo/workflows/build_nixos_configs.yml b/.forgejo/workflows/build_nixos_configs.yml
index 7ea9544..8bb55cc 100644
--- a/.forgejo/workflows/build_nixos_configs.yml
+++ b/.forgejo/workflows/build_nixos_configs.yml
@@ -20,7 +20,8 @@ jobs:
         uses: actions/checkout@v4
       - run: |
           echo 'Building configuration for ${{ matrix.system }}'
-          nix build .#nixosConfigurations.${{ matrix.system }}.config.system.build.toplevel
+          nix --extra-experimental-features nix-command --extra-experimental-features flakes \
+            build .#nixosConfigurations.${{ matrix.system }}.config.system.build.toplevel
       - name: Push build to attic
         run: |
           nix --extra-experimental-features nix-command run nixpkgs#attic-client \