"can't cd to stm" with 11.x for Drupal core

Problem / Motivation

https://simplytest.me/configure?project=drupal&project_version=11.x&patc...

65e1ebb7ba55b82d30a830c6# /bin/sh -c cd stm && composer patch-enable --file="patches.json"
/bin/sh: 1: cd: can't cd to stm

https://drupal.slack.com/archives/C8KNVGG4E/p1709305079570149

May be due to 11.x not having a proper base preview