diff --git a/.checkignore b/.checkignore
new file mode 100644
index 0000000000000000000000000000000000000000..77880227c7a7584f85236dff52c4ef0c631f0fd1
--- /dev/null
+++ b/.checkignore
@@ -0,0 +1,3 @@
+lib/*
+contrib/*
+.build/*