diff --git a/base_import_ux/__manifest__.py b/base_import_ux/__manifest__.py
index 2bd795af..9ffb5cd4 100644
--- a/base_import_ux/__manifest__.py
+++ b/base_import_ux/__manifest__.py
@@ -43,6 +43,6 @@
         ],
     },
     "installable": True,
-    "auto_install": True,
+    "auto_install": False,
     "application": False,
 }
diff --git a/base_ux/migrations/19.0.1.4.0/pre-migrate.py b/base_ux/migrations/19.0.1.4.0/pre-migrate.py
index 6272dc54..c22d65c1 100644
--- a/base_ux/migrations/19.0.1.4.0/pre-migrate.py
+++ b/base_ux/migrations/19.0.1.4.0/pre-migrate.py
@@ -1,6 +1,53 @@
-from odoo.upgrade import util
+import logging
+
+from openupgradelib import openupgrade
+
+_logger = logging.getLogger(__name__)
+
+# BTL: ``odoo.upgrade`` exposes ``util`` only when Odoo runs with ``--upgrade-path``
+# (it lives in the separate odoo/upgrade-util repo, not in odoo core). A plain
+# ``odoo-bin -u`` branch build has no such path, so the import raises ImportError and
+# aborts the whole registry load. Reimplemented in raw SQL, which is what a pre-migrate
+# stage allows anyway. ``ir_ui_view.inherit_id`` is ``ondelete='restrict'``, so the
+# inheritance tree has to be deleted bottom-up, deepest level first.
+# TODO: Upgrade 19.0 - revert if upgrade-util is ever vendored.
+
+OBSOLETE_VIEWS = [
+    ("base_ux", "view_partner_form_mobile"),
+    ("base_ux", "view_partner_tree_mobile"),
+]
 
 
 def migrate(cr, version):
-    util.remove_view(cr, "base_ux.view_partner_form_mobile")
-    util.remove_view(cr, "base_ux.view_partner_tree_mobile")
+    for module, name in OBSOLETE_VIEWS:
+        cr.execute(
+            "SELECT res_id FROM ir_model_data WHERE module = %s AND name = %s AND model = 'ir.ui.view'",
+            (module, name),
+        )
+        row = cr.fetchone()
+        if not row:
+            _logger.info("View %s.%s not present, nothing to remove", module, name)
+            continue
+
+        cr.execute(
+            """
+            WITH RECURSIVE tree AS (
+                SELECT id, 0 AS depth FROM ir_ui_view WHERE id = %s
+                UNION ALL
+                SELECT child.id, tree.depth + 1
+                  FROM ir_ui_view child
+                  JOIN tree ON child.inherit_id = tree.id
+            )
+            SELECT depth, array_agg(id) FROM tree GROUP BY depth ORDER BY depth DESC
+            """,
+            (row[0],),
+        )
+        for depth, view_ids in cr.fetchall():
+            view_ids = tuple(view_ids)
+            openupgrade.logged_query(
+                cr,
+                "DELETE FROM ir_model_data WHERE model = 'ir.ui.view' AND res_id IN %s",
+                (view_ids,),
+            )
+            openupgrade.logged_query(cr, "DELETE FROM ir_ui_view WHERE id IN %s", (view_ids,))
+            _logger.info("Removed %s inherited view(s) at depth %s of %s.%s", len(view_ids), depth, module, name)