diff --git a/.forgejo/workflows/build.yaml b/.forgejo/workflows/build.yaml
index a2224c0..6edae8f 100644
--- a/.forgejo/workflows/build.yaml
+++ b/.forgejo/workflows/build.yaml
@@ -16,6 +16,8 @@ jobs:
           chmod 600 ~/.ssh/id_ed25519
           ssh-keyscan github.com >> ~/.ssh/known_hosts
       - name: Build with nix (x86_64-linux)
-        run: nix-fast-build --no-nom --systems "x86_64-linux aarch64-linux" --attic-cache "nixfleet" --skip-cached --result-file result.json || true
+        run: nix-fast-build --no-nom --systems "x86_64-linux aarch64-linux" --skip-cached --result-file result.json || true
+      - name: Push to cache
+        run: nix run .#push-to-cache -- nixfleet
       - name: Report checks
         run: report-checks
diff --git a/checks/default.nix b/checks/default.nix
index ae2c491..9030d41 100644
--- a/checks/default.nix
+++ b/checks/default.nix
@@ -11,7 +11,7 @@
   ];
 
   perSystem =
-    { config, ... }:
+    { config, pkgs, ... }:
     {
       treefmt.config = {
         projectRootFile = ".git/config";
@@ -42,6 +42,18 @@
           package = config.treefmt.build.wrapper;
         };
       };
+      packages.push-to-cache =
+        let
+          allChecks = with self.checks; x86_64-linux // aarch64-linux;
+          checks = builtins.removeAttrs allChecks [ "push-to-cache" ];
+        in
+        pkgs.writeShellScriptBin "push-to-cache.sh" ''
+          attic push $1 --stdin --jobs 64 << EOF
+          ${lib.concatStringsSep "\n" (
+            builtins.map (builtins.unsafeDiscardStringContext) (builtins.attrValues checks)
+          )}
+          EOF
+        '';
     };
 
   flake.checks =
@@ -49,7 +61,9 @@
       build = _: nc: nc.config.system.build.toplevel;
     in
     {
-      x86_64-linux = lib.mapAttrs build { inherit (self.nixosConfigurations) picard pike kirk; };
+      x86_64-linux = (lib.mapAttrs build { inherit (self.nixosConfigurations) picard pike kirk; }) // {
+        inherit (self.checks.x86_64-linux) push-to-cache;
+      };
       aarch64-linux = lib.mapAttrs build {
         inherit (self.nixosConfigurations) sisko; # pbp;
       };