diff --git a/modules/microvm.nix b/modules/microvm.nix
index 4d6432c6..b44048e8 100644
--- a/modules/microvm.nix
+++ b/modules/microvm.nix
@@ -66,7 +66,7 @@ in
     copyToServer = writeScript "copy-to-${server}" ''
       #! ${runtimeShell} -e
 
-      nix copy --to ssh-ng://root@${serverFQDN} $@
+      nix copy --no-check-sigs --to ssh-ng://root@${serverFQDN} $@
     '';
 
     runOnServer = writeScript "run-on-${server}" ''