1 files changed, 2 insertions, 9 deletions
diff --git a/pw_sys_io/BUILD.gn b/pw_sys_io/BUILD.gn
index bdff7eb6a..47feb4377 100644
--- a/pw_sys_io/BUILD.gn
+++ b/pw_sys_io/BUILD.gn
@@ -17,11 +17,7 @@ import("//build_overrides/pigweed.gni")
 import("$dir_pw_build/facade.gni")
 import("$dir_pw_build/target_types.gni")
 import("$dir_pw_docgen/docs.gni")
-
-declare_args() {
-  # Backend for the pw_sys_io module.
-  pw_sys_io_BACKEND = ""
-}
+import("backend.gni")
 
 config("default_config") {
   include_dirs = [ "public" ]
@@ -30,10 +26,7 @@ config("default_config") {
 pw_facade("pw_sys_io") {
   backend = pw_sys_io_BACKEND
   public_configs = [ ":default_config" ]
-  public_deps = [
-    "$dir_pw_span",
-    "$dir_pw_status",
-  ]
+  public_deps = [ dir_pw_status ]
   public = [ "public/pw_sys_io/sys_io.h" ]
 }