Index: platformio-4.3.4/platformio/__main__.py
===================================================================
--- platformio-4.3.4.orig/platformio/__main__.py
+++ platformio-4.3.4/platformio/__main__.py
@@ -62,13 +62,29 @@ def cli(ctx, force, caller, no_ansi):
 
     maintenance.on_platformio_start(ctx, force, caller)
 
+# NOTE(nuno): adapted from https://github.com/platformio/platformio-core/commit/b04bb2b74048d9bbe0671b5fa2a99b6190fed737
+try:
 
-@cli.resultcallback()
-@click.pass_context
-def process_result(ctx, result, *_, **__):
-    maintenance.on_platformio_end(ctx, result)
+    @cli.result_callback()
+    @click.pass_context
+    def process_result(ctx, result, *_, **__):
+        _process_result(ctx, result)
+
+
+except (AttributeError, TypeError):  # legacy support for CLick > 8.0.1
+    print("legacy Click")
+
+    @cli.resultcallback()
+    @click.pass_context
+    def process_result(ctx, result, *_, **__):
+        _process_result(ctx, result)
 
 
+def _process_result(ctx, result):
+    from platformio import maintenance
+
+    maintenance.on_platformio_end(ctx, result)
+
 @util.memoized()
 def configure():
     if CYGWIN: