diff --git a/options/auto-upgrade.nix b/options/auto-upgrade.nix
index 0c84db4..e6e782e 100644
--- a/options/auto-upgrade.nix
+++ b/options/auto-upgrade.nix
@@ -52,6 +52,7 @@ in
                 nixos-rebuild = "${config.system.build.nixos-rebuild}/bin/nixos-rebuild";
                 nix-store = "${pkgs.nix}/bin/nix-store";
                 diff = "${pkgs.diffutils}/bin/diff";
+                grep = "${pkgs.gnugrep}/bin/grep";
                 git = "${pkgs.git}/bin/git";
                 ssh = "${pkgs.openssh}/bin/ssh";
                 sudo = "${pkgs.sudo}/bin/sudo";
@@ -164,11 +165,26 @@ in
                         )"
                         activate_configuration="no"
 
-                        # Check if any user sessions are open
-                        active_users=$(users | tr ' ' '\n' | sort | uniq | grep -vE '^(${concatStringsSep "|" cfg.rebootIgnoreUsersActive})$' || true)
-                        if [ "$reboot_allowed" = "yes" ] && [ -n "$active_users" ] ; then
-                            reboot_allowed=no
-                            email_body="$(printf "%s\n%s\n%s" "$email_body" "The system cannot reboot since the following users are active:" "$active_users")"
+                        if [ "$reboot_allowed" = "yes" ] ; then
+                            echo "→ Checking if a reboot is allowed." | tee -a "$output_file"
+
+                            # Check if any user sessions are open
+                            active_users=$(users | tr ' ' '\n' | sort | uniq | ${grep} -vE '^(${concatStringsSep "|" cfg.rebootIgnoreUsersActive})$' || true)
+                            if [ -n "$active_users" ] ; then
+                                reboot_allowed=no
+                                email_body="$(printf "%s\n%s\n%s" "$email_body" "The system cannot reboot since the following users are active:" "$active_users")"
+                                echo "$(echo $active_users | wc -l) active users blocking reboot." | tee -a "$output_file"
+                            fi
+
+                            ${optionalString config.virtualisation.libvirtd.enable ''
+                            # Check if virtual machines are running
+                            active_vms=$(${pkgs.libvirt}/bin/virsh list --state-running --no-autostart --id --name || true)
+                            if [ -n "$active_vms" ] ; then
+                                reboot_allowed=no
+                                email_body="$(printf "%s\n%s\n%s" "$email_body" "The system cannot reboot since the following virtual machines are active:" "$active_vms")"
+                                echo "$(echo $active_vms | wc -l) active VMs blocking reboot." | tee -a "$output_file"
+                            fi
+                            ''}
                         fi
 
                         if [ "$reboot_allowed" = "yes" ] && [ $exit_code -eq 0 ] ; then
@@ -193,7 +209,7 @@ in
                 upgrade_output="$(cat "$output_file")"
                 rm -f "$output_file"
 
-                possible_warnings="$(grep -e "^\(warning\|trace\|evaluation warning\):" <<<"$upgrade_output" || true)"
+                possible_warnings="$(${grep} -e "^\(warning\|trace\|evaluation warning\):" <<<"$upgrade_output" || true)"
                 if [ "$possible_warnings" != "" ] ; then
                     send_email=yes
                     email_subject_additions="$email_subject_additions with warnings"