diff --git a/bindgen/private/bindgen.bzl b/bindgen/private/bindgen.bzl
index 06f0595db2..b4cacb533a 100644
--- a/bindgen/private/bindgen.bzl
+++ b/bindgen/private/bindgen.bzl
@@ -314,6 +314,9 @@ def _rust_bindgen_impl(ctx):
         env = env,
         arguments = [args],
         tools = tools,
+        # ctx.actions.run now require (through a buildifier check) that we
+        # specify this
+        toolchain = None,
     )
 
     return [