--- /dev/null	1970-01-01 00:00:00.000000001 +0000
+++ BUILD.bazel	1970-01-01 00:00:00.000000001 +0000
@@ -0,0 +1,3 @@
+load("@some//repo:rules.bzl", "custom_rule")
+
+custom_rule(name = "gen")