diff --git a/osbase/net/dhcp4c/callback/BUILD.bazel b/osbase/net/dhcp4c/callback/BUILD.bazel
new file mode 100644
index 0000000..a8780fc
--- /dev/null
+++ b/osbase/net/dhcp4c/callback/BUILD.bazel
@@ -0,0 +1,33 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+load("//osbase/test/ktest:ktest.bzl", "k_test")
+
+go_library(
+    name = "callback",
+    srcs = ["callback.go"],
+    importpath = "source.monogon.dev/osbase/net/dhcp4c/callback",
+    visibility = ["//visibility:public"],
+    deps = [
+        "//osbase/net/dhcp4c",
+        "@com_github_insomniacslk_dhcp//dhcpv4",
+        "@com_github_vishvananda_netlink//:netlink",
+        "@org_golang_x_sys//unix",
+    ],
+)
+
+go_test(
+    name = "callback_test",
+    srcs = ["callback_test.go"],
+    embed = [":callback"],
+    deps = [
+        "//osbase/net/dhcp4c",
+        "@com_github_google_go_cmp//cmp",
+        "@com_github_insomniacslk_dhcp//dhcpv4",
+        "@com_github_vishvananda_netlink//:netlink",
+        "@org_golang_x_sys//unix",
+    ],
+)
+
+k_test(
+    name = "ktest",
+    tester = ":callback_test",
+)