diff --git a/backup.nix b/backup.nix
index 88c588a..4009b3f 100644
--- a/backup.nix
+++ b/backup.nix
@@ -20,7 +20,7 @@ let
   notifyErrorPkg = pkgs.writeShellApplication {
     name = "notify-error";
 
-    runtimeInputs = [ pkgs.system-sendmail ];
+    runtimeInputs = [ pkgs.system-sendmail pkgs.coreutils ];
 
     text = ''
       from="noreply+$1@admin.egirls.gay"
@@ -119,14 +119,13 @@ in {
       invocationId="$(systemctl show --value -p InvocationID misskey-backup.service)"
       logs="$(journalctl _SYSTEMD_INVOCATION_ID= -u misskey-backup.service)"
 
-      ${notifyErrorPkg}/bin/notify-error "backup" "Misskey Backup Failure Notification" "$(<<EOMSG
+      ${notifyErrorPkg}/bin/notify-error "backup" "Misskey Backup Failure Notification" "$(cat <<EOMSG
       A backup process has failed. Logs to follow:
 
       $logs
 
       EOMSG
-      )
-      "
+      )"
     '';
 
     requires = [ "postfix.service" ];