diff --git a/metropolis/node/build/def.bzl b/metropolis/node/build/def.bzl
index 7baa16b..d71279c 100644
--- a/metropolis/node/build/def.bzl
+++ b/metropolis/node/build/def.bzl
@@ -13,6 +13,7 @@
 #  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
+load("@bazel_skylib//lib:paths.bzl", "paths")
 
 def _build_pure_transition_impl(settings, attr):
     """
@@ -338,3 +339,75 @@
         ),
     },
 )
+
+# From Aspect's bazel-lib under Apache 2.0
+def _transition_platform_impl(_, attr):
+    return {"//command_line_option:platforms": str(attr.target_platform)}
+
+# Transition from any input configuration to one that includes the
+# --platforms command-line flag.
+_transition_platform = transition(
+    implementation = _transition_platform_impl,
+    inputs = [],
+    outputs = ["//command_line_option:platforms"],
+)
+
+
+def _platform_transition_binary_impl(ctx):
+    # We need to forward the DefaultInfo provider from the underlying rule.
+    # Unfortunately, we can't do this directly, because Bazel requires that the executable to run
+    # is actually generated by this rule, so we need to symlink to it, and generate a synthetic
+    # forwarding DefaultInfo.
+
+    result = []
+    binary = ctx.attr.binary[0]
+
+    default_info = binary[DefaultInfo]
+    files = default_info.files
+    new_executable = None
+    original_executable = default_info.files_to_run.executable
+    runfiles = default_info.default_runfiles
+
+    if not original_executable:
+        fail("Cannot transition a 'binary' that is not executable")
+
+    new_executable_name = ctx.attr.basename if ctx.attr.basename else original_executable.basename
+
+    # In order for the symlink to have the same basename as the original
+    # executable (important in the case of proto plugins), put it in a
+    # subdirectory named after the label to prevent collisions.
+    new_executable = ctx.actions.declare_file(paths.join(ctx.label.name, new_executable_name))
+    ctx.actions.symlink(
+        output = new_executable,
+        target_file = original_executable,
+        is_executable = True,
+    )
+    files = depset(direct = [new_executable], transitive = [files])
+    runfiles = runfiles.merge(ctx.runfiles([new_executable]))
+
+    result.append(
+        DefaultInfo(
+            files = files,
+            runfiles = runfiles,
+            executable = new_executable,
+        ),
+    )
+
+    return result
+
+platform_transition_binary = rule(
+    implementation = _platform_transition_binary_impl,
+    attrs = {
+        "basename": attr.string(),
+        "binary": attr.label(allow_files = True, cfg = _transition_platform),
+        "target_platform": attr.label(
+            doc = "The target platform to transition the binary.",
+            mandatory = True,
+        ),
+        "_allowlist_function_transition": attr.label(
+            default = "@bazel_tools//tools/allowlists/function_transition_allowlist",
+        ),
+    },
+    executable = True,
+    doc = "Transitions the binary to use the provided platform.",
+)
\ No newline at end of file