diff --git a/iso/overlay/airootfs/etc/systemd/system/furtka-webinstaller.service b/iso/overlay/airootfs/etc/systemd/system/furtka-webinstaller.service
index 612aa58..e02ec5a 100644
--- a/iso/overlay/airootfs/etc/systemd/system/furtka-webinstaller.service
+++ b/iso/overlay/airootfs/etc/systemd/system/furtka-webinstaller.service
@@ -6,6 +6,14 @@ Wants=network-online.target
 [Service]
 Type=simple
 WorkingDirectory=/opt/furtka
+# Python 3.14's new pathlib.Path.copy() refuses source==target paths, and
+# archinstall's sync_log_to_install_medium() trips on that at __exit__
+# because the chroot bindmount is already gone by the time it copies
+# /var/log/archinstall/install.log. The install itself has already
+# succeeded; this just means the log-sync step throws a misleading
+# traceback. Neutralise the call on the live ISO (never runs on the
+# target) so users don't see it. Idempotent — second run is a no-op.
+ExecStartPre=/bin/sh -c 'sed -i "s|absolute_logfile\\.copy(logfile_target, preserve_metadata=True)|None  # furtka patch: py3.14 Path.copy same-path workaround|" /usr/lib/python*/site-packages/archinstall/lib/installer.py || true'
 ExecStart=/usr/bin/python -m flask --app app run --host 0.0.0.0 --port 5000
 Restart=on-failure
 RestartSec=3