diff --git a/nix/modules/ec-node.nix b/nix/modules/ec-node.nix
index e519e82..a6e57a6 100644
--- a/nix/modules/ec-node.nix
+++ b/nix/modules/ec-node.nix
@@ -281,7 +281,12 @@ in
                       base="http://$base"
                     fi
 
-                    input="$base/auto/v$ch"
+                    # HDHomeRun streaming is on port 5004, regardless of the discover BaseURL.
+                    hostport="''${base#http://}"
+                    hostport="''${hostport#https://}"
+                    hostport="''${hostport%%/*}"
+                    host="''${hostport%%:*}"
+                    input="http://$host:5004/auto/v$ch"
                   fi
 
                   cmd=(