diff --git a/app/graph/meson.build b/app/graph/meson.build
index 5b0f966d99e..8aefdf505c3 100644
--- a/app/graph/meson.build
+++ b/app/graph/meson.build
@@ -5,6 +5,7 @@
 name = 'graph'
 build = cc.has_header('sys/epoll.h')
 if not build
+    reason = 'only supported on Linux'
     subdir_done()
 endif