diff --git a/metropolis/pkg/combinectx/BUILD.bazel b/metropolis/pkg/combinectx/BUILD.bazel
new file mode 100644
index 0000000..d467c47
--- /dev/null
+++ b/metropolis/pkg/combinectx/BUILD.bazel
@@ -0,0 +1,17 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["combinectx.go"],
+    importpath = "source.monogon.dev/metropolis/pkg/combinectx",
+    visibility = ["//visibility:public"],
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = [
+        "combinectx_test.go",
+        "example_test.go",
+    ],
+    embed = [":go_default_library"],
+)