diff --git a/metropolis/pkg/msguid/BUILD.bazel b/metropolis/pkg/msguid/BUILD.bazel
new file mode 100644
index 0000000..9be5fdb
--- /dev/null
+++ b/metropolis/pkg/msguid/BUILD.bazel
@@ -0,0 +1,19 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+
+go_library(
+    name = "msguid",
+    srcs = ["msguid.go"],
+    importpath = "source.monogon.dev/metropolis/pkg/msguid",
+    visibility = ["//visibility:public"],
+    deps = ["@com_github_google_uuid//:uuid"],
+)
+
+go_test(
+    name = "msguid_test",
+    srcs = ["msguid_test.go"],
+    embed = [":msguid"],
+    deps = [
+        "@com_github_google_go_cmp//cmp",
+        "@com_github_google_uuid//:uuid",
+    ],
+)