diff --git a/build/bazel/toolchain.MODULE.bazel b/build/bazel/toolchain.MODULE.bazel
new file mode 100644
index 0000000..f0434f5
--- /dev/null
+++ b/build/bazel/toolchain.MODULE.bazel
@@ -0,0 +1,19 @@
+http_archive = use_repo_rule("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
+http_archive(
+    name = "toolchain-bundle-x86_64-unknown-linux-musl",
+    build_file = "//build/toolchain/toolchain-bundle:toolchain-bundle.bzl",
+    integrity = "sha256-tpbvNL5S4t2WLkcj027sghf8tEzVJFL1e5leyx8JkCI=",
+    urls = [
+        "https://storage.googleapis.com/monogon-infra-public/toolchain/toolchain-bundle-x86_64-unknown-linux-musl-release-25.05.ffdcefdde9a4e540d1c875767da0e382e1ccf460.tar.zst",
+    ],
+)
+
+http_archive(
+    name = "toolchain-bundle-aarch64-unknown-linux-musl",
+    build_file = "//build/toolchain/toolchain-bundle:toolchain-bundle.bzl",
+    integrity = "sha256-6caDQ8S+DGXHy2xSAhfRu5EXFLZ7NNqbtkY6o1i33F4=",
+    urls = [
+        "https://storage.googleapis.com/monogon-infra-public/toolchain/toolchain-bundle-aarch64-unknown-linux-musl-release-25.05.ffdcefdde9a4e540d1c875767da0e382e1ccf460.tar.zst",
+    ],
+)