diff --git a/pkgs/by-name/tu/tunnelgraf/package.nix b/pkgs/by-name/tu/tunnelgraf/package.nix
index 254bffb5859d..ca5be266e658 100644
--- a/pkgs/by-name/tu/tunnelgraf/package.nix
+++ b/pkgs/by-name/tu/tunnelgraf/package.nix
@@ -40,6 +40,7 @@ py.pkgs.buildPythonApplication rec {
     "psutil"
     "pydantic"
     "python-hosts"
+    "wcwidth"
   ];
 
   build-system = with py.pkgs; [ hatchling ];