--- /dev/null
+// +build ios linux,arm64 !darwin,!freebsd,!linux,!netbsd,!solaris,!windows
+
+// This is the fallback implementation of directory watching.
+// It is used on unsupported platforms.
+
+package pseudohsm
+
+type watcher struct{ running bool }
+
+func newWatcher(*keyCache) *watcher { return new(watcher) }
+func (*watcher) start() {}
+func (*watcher) close() {}