diff --git a/osbase/blockdev/BUILD.bazel b/osbase/blockdev/BUILD.bazel
new file mode 100644
index 0000000..0805ef6
--- /dev/null
+++ b/osbase/blockdev/BUILD.bazel
@@ -0,0 +1,28 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "blockdev",
+    srcs = [
+        "blockdev.go",
+        "blockdev_darwin.go",
+        "blockdev_linux.go",
+        "memory.go",
+    ],
+    importpath = "source.monogon.dev/osbase/blockdev",
+    visibility = ["//visibility:public"],
+    deps = select({
+        "@io_bazel_rules_go//go/platform:android": [
+            "@org_golang_x_sys//unix",
+        ],
+        "@io_bazel_rules_go//go/platform:darwin": [
+            "@org_golang_x_sys//unix",
+        ],
+        "@io_bazel_rules_go//go/platform:ios": [
+            "@org_golang_x_sys//unix",
+        ],
+        "@io_bazel_rules_go//go/platform:linux": [
+            "@org_golang_x_sys//unix",
+        ],
+        "//conditions:default": [],
+    }),
+)