diff --git a/debug_off.go b/debug_off.go
new file mode 100644
index 0000000..18df715
--- /dev/null
+++ b/debug_off.go
@@ -0,0 +1,6 @@
+//go:build !debug
+
+package appx
+
+// IsDebugBuild reports whether compilation was with `-tags=debug` flag.
+const IsDebugBuild = false
diff --git a/debug_on.go b/debug_on.go
new file mode 100644
index 0000000..8ae6c96
--- /dev/null
+++ b/debug_on.go
@@ -0,0 +1,6 @@
+//go:build debug
+
+package appx
+
+// IsDebugBuild reports whether compilation was with `-tags=debug` flag.
+const IsDebugBuild = true