diff --git a/helpers.inc.php b/helpers.inc.php
index c35ad7f..12ce470 100644
--- a/helpers.inc.php
+++ b/helpers.inc.php
@@ -924,20 +924,23 @@ function run_background_proc($bin, array $args = array(), $redirect_out = '', $r
   }
 }
 
-function run_background_gamectl_workers(string $task, array $worker_args) : array
+function run_background_gamectl_workers(string $task, array $worker_args, ?string $tmp_dir = null) : array
 {
   global $GAME_ROOT;
 
   $results = array();
   $workers = array();
 
+  if($tmp_dir === null)
+    $tmp_dir = $GAME_ROOT . "/build/tmp";
+
   foreach($worker_args as $idx => $args)
   {
     $uid = uniqid();
-    $in_file = $GAME_ROOT . "/build/tmp/in_$uid.work";
-    $out_file = $GAME_ROOT  . "/build/tmp/out_$uid.work";
-    $log_file = $GAME_ROOT  . "/build/tmp/log_$uid.work";
-    $err_file = $GAME_ROOT  . "/build/tmp/err_$uid.work";
+    $in_file = $tmp_dir . "/in_$uid.work";
+    $out_file = $tmp_dir  . "/out_$uid.work";
+    $log_file = $tmp_dir  . "/log_$uid.work";
+    $err_file = $tmp_dir  . "/err_$uid.work";
 
     $workers[] = array($in_file, $out_file, $log_file, $err_file);
 
@@ -986,7 +989,16 @@ function run_background_gamectl_workers(string $task, array $worker_args) : arra
           throw new Exception("Error in worker $idx:\n" . file_get_contents($err_file));
 
         if(is_file($out_file))
-          $results[$idx] = @unserialize(ensure_read($out_file));
+        {
+          try
+          {
+            $results[$idx] = unserialize(ensure_read($out_file));
+          }
+          catch(Exception $e)
+          {
+            $results[$idx] = false;
+          }
+        }
       }
     }
   }
@@ -995,10 +1007,14 @@ function run_background_gamectl_workers(string $task, array $worker_args) : arra
     foreach($workers as $item)
     {
       list($in_file, $out_file, $log_file, $err_file) = $item;
-      @ensure_rm($in_file);
-      @ensure_rm($out_file);
-      @ensure_rm($log_file);
-      @ensure_rm($err_file);
+      try
+      {
+        ensure_rm($in_file);
+        ensure_rm($out_file);
+        ensure_rm($log_file);
+        ensure_rm($err_file);
+      }
+      catch(Exception $e) {}
     }
   }