diff --git a/project.py b/project.py
index 614e7f3..771a80a 100644
--- a/project.py
+++ b/project.py
@@ -484,7 +484,7 @@ class Project:
             harden_cmd = f"python -m openlane --dockerized --run-tag wokwi --force-run-dir runs/wokwi {progress} src/config_merged.json"
         else:
             # requires PDK, PDK_ROOT, OPENLANE_ROOT & OPENLANE_IMAGE_NAME to be set in local environment
-            harden_cmd = 'docker run --rm -v $OPENLANE_ROOT:/openlane -v $PDK_ROOT:$PDK_ROOT -v $(pwd):/work -e PDK=$PDK -e PDK_ROOT=$PDK_ROOT -u $(id -u $USER):$(id -g $USER) $OPENLANE_IMAGE_NAME /bin/bash -c "./flow.tcl -overwrite -design /work/src -run_path /work/runs -config_file /work/src/config_merged.json -tag wokwi"'
+            harden_cmd = "docker run --rm -v $OPENLANE_ROOT:/openlane -v $PDK_ROOT:$PDK_ROOT -v $(pwd):/work -e PDK=$PDK -e PDK_ROOT=$PDK_ROOT -u $(id -u $USER):$(id -g $USER) $OPENLANE_IMAGE_NAME ./flow.tcl -overwrite -design /work/src -run_path /work/runs -config_file /work/src/config_merged.json -tag wokwi"
         logging.debug(harden_cmd)
         env = os.environ.copy()
         p = subprocess.run(harden_cmd, shell=True, env=env)