diff --git a/.forgejo/workflows/cache.yaml b/.forgejo/workflows/cache.yaml
index ef0c143..900b4c1 100644
--- a/.forgejo/workflows/cache.yaml
+++ b/.forgejo/workflows/cache.yaml
@@ -6,18 +6,19 @@ jobs:
     steps:
       - name: Checkout repo
         uses: actions/checkout@v5
-      # - name: Install nix
-      #   uses: https://github.com/cachix/install-nix-action@v31
-      # - name: Setup system cache
-      #   uses: actions/cache@v3
-      #   with:
-      #     path: /nix/store
-      #     key: nix-cache
       - name: Setup Attic cache
         uses: https://github.com/ryanccn/attic-action@v0
         with:
           endpoint: ${{ secrets.ATTIC_ENDPOINT }}
           cache: ${{ secrets.ATTIC_CACHE }}
           token: ${{ secrets.ATTIC_TOKEN }}
+      - name: Build baldur configuration
+        run: nix build .#nixosConfigurations.baldur.config.system.build.toplevel
+      - name: Build bragi configuration
+        run: nix build .#nixosConfigurations.bragi.config.system.build.toplevel
+      - name: Build thor configuration
+        run: nix build .#nixosConfigurations.thor.config.system.build.toplevel
+      - name: Build odin configuration
+        run: nix build .#nixosConfigurations.odin.config.system.build.toplevel
       - name: Build freyja configuration
         run: nix build .#nixosConfigurations.freyja.config.system.build.toplevel
diff --git a/modules/linux/nixos/nix-options.nix b/modules/linux/nixos/nix-options.nix
index eafdde8..8b5e9b0 100644
--- a/modules/linux/nixos/nix-options.nix
+++ b/modules/linux/nixos/nix-options.nix
@@ -15,6 +15,7 @@
       "https://cache.nixos-cuda.org"
       "https://deploy-rs.cachix.org"
       "https://attic.xuyh0120.win/lantian"
+      "https://cache.cronyakatsuki.xyz/server"
     ];
     trusted-substituters = [
       "https://hyprland.cachix.org"
@@ -27,6 +28,7 @@
       "cache.nixos-cuda.org:74DUi4Ye579gUqzH4ziL9IyiJBlDpMRn9MBN8oNan9M="
       "deploy-rs.cachix.org-1:xfNobmiwF/vzvK1gpfediPwpdIP0rpDV2rYqx40zdSI="
       "lantian:EeAUQ+W+6r7EtwnmYjeVwx5kOGEBpjlBfPlzGlTNvHc="
+      "server:H3UiSzK++1xgvbI/0BgWc2Ug/srJ45x05Zc9DqNUsxM="
     ];
   };
 
diff --git a/modules/servers/per-server/baldur/services/forgejo-runner.nix b/modules/servers/per-server/baldur/services/forgejo-runner.nix
index 6a8a95d..6905eb0 100644
--- a/modules/servers/per-server/baldur/services/forgejo-runner.nix
+++ b/modules/servers/per-server/baldur/services/forgejo-runner.nix
@@ -41,4 +41,6 @@
       size = 16 * 1024; # 16 GB
     }
   ];
+
+  nix.settings.max-jobs = 1;
 }