diff --git a/lib/src/main.rs b/lib/src/main.rs
new file mode 100644
index 0000000..e3a255d
--- /dev/null
+++ b/lib/src/main.rs
@@ -0,0 +1,5 @@
+#[cfg(not(debug_assertions))]
+compile_error!("The watchexec CLI has moved to the watchexec-cli crate");
+fn main() {
+    panic!("The watchexec CLI has moved to the watchexec-cli crate");
+}