diff --git a/pyproject.toml b/pyproject.toml
index 98b91a7..c830f45 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,13 +1,25 @@
+[build-system]
+requires = ["setuptools>=61"]
+build-backend = "setuptools.build_meta"
+
 [project]
 name = "wake-alarm"
 version = "1.0.0"
-description = "Hibernate-scheduled weekend wake alarm with fan ramp and smart-plug control"
+description = "Phone-driven wake alarm with fan ramp and smart-plug control"
 requires-python = ">=3.10"
 dependencies = [
     "gatelock @ git+https://github.com/kuhyx/utils@gatelock-v0.1.0#subdirectory=gatelock",
     "python-kasa>=0.7",
 ]
 
+# Package discovery must be explicit: phone_app/ is a Flutter app, not a Python
+# package, but setuptools' flat-layout autodiscovery still sees it as a second
+# top-level package and refuses to build ("Multiple top-level packages
+# discovered in a flat-layout"). That aborted install.sh at step 1 — which is
+# how /usr/local/bin/shutdown silently went stale.
+[tool.setuptools.packages.find]
+include = ["wake_alarm*"]
+
 [tool.ruff]
 target-version = "py310"
 include = ["*.py", "**/*.py"]