diff --git a/lib/deploy.nix b/lib/deploy.nix
index 09d4350..aa730eb 100644
--- a/lib/deploy.nix
+++ b/lib/deploy.nix
@@ -56,7 +56,7 @@ let
     in ''
       (
         echo "deploying ${hostname}..."
-        nix copy --no-check-sigs --to ssh://${hostAttrs.ssh.host} ${nixosSystem}
+        nix copy --no-check-sigs -s --to ssh://${hostAttrs.ssh.host} ${nixosSystem}
         ssh $NIX_SSHOPTS ${hostAttrs.ssh.host} "sudo nix-env -p /nix/var/nix/profiles/system -i ${nixosSystem}"
         ssh $NIX_SSHOPTS ${hostAttrs.ssh.host} "sudo /nix/var/nix/profiles/system/bin/switch-to-configuration $MODE $ARGS"
       ) &