diff --git a/flake.nix b/flake.nix
index 20b0851c..067b6c5c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -237,6 +237,14 @@
               ssh ${target} nixos-rebuild ${rebuildArg} "$@"
             '';
 
+            "prebuild-${name}-on-hydra" = pkgs.writeScriptBin "${name}-nixos-rebuild" ''
+              #!${pkgs.runtimeShell} -ex
+              nix copy --to ssh://root@hydra.serv.zentralwerk.org ${secrets}
+              nix copy --to ssh://root@hydra.serv.zentralwerk.org ${self}
+              ssh ssh://root@hydra.serv.zentralwerk.org -- \
+                nix build -L ${self}#nixosConfigurations.${name}.config.system.build.toplevel
+            '';
+
             "${name}-nixos-rebuild-local" = pkgs.writeScriptBin "${name}-nixos-rebuild" ''
                #!${pkgs.runtimeShell} -ex
                [[ $(ssh ${target} cat /etc/hostname) == ${name} ]]