diff --git a/minimal_scheduler.cpp b/minimal_scheduler.cpp
index afc545f..396deae 100644
--- a/minimal_scheduler.cpp
+++ b/minimal_scheduler.cpp
@@ -1,3 +1,5 @@
+// Build with: clang++ --std=c++20 -g -O1 schedtest.cpp
+
 #include <array>
 #include <span>
 #include <memory>