diff --git a/version/defs.bzl b/version/defs.bzl
new file mode 100644
index 0000000..d0e439b
--- /dev/null
+++ b/version/defs.bzl
@@ -0,0 +1,79 @@
+load(
+    "@io_bazel_rules_go//go:def.bzl",
+    "GoLibrary",
+    "go_context",
+    "go_library",
+)
+
+def _go_version_library_impl(ctx):
+    output = ctx.actions.declare_file(ctx.attr.name + "_generated.go")
+
+    ctx.actions.run(
+        mnemonic = "GenVersion",
+        progress_message = "Generating version file",
+        inputs = [ctx.info_file],
+        outputs = [output],
+        executable = ctx.executable._genversion,
+        arguments = [
+            "-importpath",
+            ctx.attr.importpath,
+            "-product",
+            ctx.attr.product,
+            "-status_file",
+            ctx.info_file.path,
+            "-out_file",
+            output.path,
+        ],
+    )
+
+    go = go_context(ctx)
+    source_files = [output]
+    library = go.new_library(
+        go,
+        srcs = source_files,
+    )
+    source = go.library_to_source(go, ctx.attr, library, False)
+    providers = [library, source]
+    output_groups = {
+        "go_generated_srcs": source_files,
+    }
+    return providers + [OutputGroupInfo(**output_groups)]
+
+go_version_library = rule(
+    doc = """
+        Generate a Go library target which can be further embedded/depended upon
+        by other Go code. This library contains a Version proto field which will
+        be automatically populated with version based on build state data.
+    """,
+    implementation = _go_version_library_impl,
+    attrs = {
+        "importpath": attr.string(
+            mandatory = True,
+        ),
+        "product": attr.string(
+            mandatory = True,
+            doc = """
+                Name of Monogon product that for which this version library will
+                be generated. This must correspond to the product name as used in
+                Git tags, which in turn is used to extract a release version
+                during a build.
+            """,
+        ),
+        "_genversion": attr.label(
+            default = Label("//version/stampgo"),
+            cfg = "host",
+            executable = True,
+            allow_files = True,
+        ),
+        "_go_context_data": attr.label(
+            default = "@io_bazel_rules_go//:go_context_data",
+        ),
+        "deps": attr.label_list(
+            default = [
+                "@org_golang_google_protobuf//proto",
+                "//version/spec",
+            ],
+        ),
+    },
+    toolchains = ["@io_bazel_rules_go//go:toolchain"],
+)