diff --git a/src/Process/ProcessHelper.php b/src/Process/ProcessHelper.php
index 591e916fee..ba6827b64e 100644
--- a/src/Process/ProcessHelper.php
+++ b/src/Process/ProcessHelper.php
@@ -11,6 +11,7 @@
 use function is_bool;
 use function php_ini_loaded_file;
 use function sprintf;
+use function sys_get_temp_dir;
 use const PHP_BINARY;
 
 final class ProcessHelper
@@ -32,6 +33,8 @@ public static function getWorkerCommand(
 
 		$processCommandArray = [
 			$phpCmd,
+			'-d',
+			'sys_temp_dir=' . escapeshellarg(sys_get_temp_dir()),
 		];
 
 		if ($input->getOption('memory-limit') === null) {