diff --git a/nixos-infect b/nixos-infect
index 30c73bb..047f603 100644
--- a/nixos-infect
+++ b/nixos-infect
@@ -21,6 +21,7 @@ makeConf() {
   for trypath in /root/.ssh/authorized_keys /home/$SUDO_USER/.ssh/authorized_keys $HOME/.ssh/authorized_keys; do
       [[ -r "$trypath" ]] \
       && keys=$(sed -E 's/^.*((ssh|ecdsa)-[^[:space:]]+)[[:space:]]+([^[:space:]]+)([[:space:]]*.*)$/\1 \3\4/' "$trypath") \
+      && [[ ! -z "$keys" ]] \
       && break
   done
   local network_import=""