diff --git a/BUILD b/BUILD
new file mode 100644
index 0000000..555b968
--- /dev/null
+++ b/BUILD
@@ -0,0 +1,41 @@
+load("@bazel_gazelle//:def.bzl", "gazelle")
+
+# gazelle:prefix git.monogon.dev/source/smalltown.git
+gazelle(name = "gazelle")
+
+genrule(
+    name = "image",
+    srcs = [
+        "@//cmd/mkimage",
+        "@//build/linux_kernel:image",
+    ],
+    outs = [
+        "smalltown.img",
+    ],
+    cmd = """
+    $(location @//cmd/mkimage) $(location @//build/linux_kernel:image) $@
+    """,
+    visibility = ["//visibility:public"],
+)
+
+genrule(
+    name = "swtpm_data",
+    outs = [
+        "tpm/tpm2-00.permall",
+    ],
+    cmd = """
+    mkdir tpm
+
+    swtpm_setup \
+        --tpmstate tpm \
+        --create-ek-cert \
+        --create-platform-cert \
+        --allow-signing \
+        --tpm2 \
+        --display \
+        --pcr-banks sha1,sha256,sha384,sha512
+
+    cp tpm/tpm2-00.permall $@
+    """,
+    visibility = ["//visibility:public"],
+)