diff --git a/build/toolchain/llvm-efi/transition.bzl b/build/toolchain/llvm-efi/transition.bzl
index 1edb86b..9c222e6 100644
--- a/build/toolchain/llvm-efi/transition.bzl
+++ b/build/toolchain/llvm-efi/transition.bzl
@@ -1,9 +1,9 @@
-def _build_efi_transition_impl(settings, attr):
+def _build_efi_transition_impl(_settings, _attr):
     """
     Transition that enables building for an EFI environment. Currently only supports C code.
     """
     return {
-        "//command_line_option:platforms": "//build/platforms:efi_amd64"
+        "//command_line_option:platforms": "//build/platforms:efi_amd64",
     }
 
 build_efi_transition = transition(