diff --git a/install.py b/install.py
index 544ac1b..6a9db94 100755
--- a/install.py
+++ b/install.py
@@ -132,8 +132,7 @@ class OutputConfig:
         if self.background_path is None:
             return {}
 
-        # TODO: match by serial number instead of by port
-        key = self.port
+        key = self.match
         if self.match == "*":
             key = "any"