nixpkgs/pkgs/applications/editors/cudatext/dont-check-update.patch

diff --git i/app/formmain.pas w/app/formmain.pas
index f6f37febb..cf993d75e 100644
--- i/app/formmain.pas
+++ w/app/formmain.pas
@@ -2156,6 +2156,7 @@ begin
     false
     {$endif};
     *)
+  mnuHelpCheckUpd.Enabled:=false;
 
   with AppPanels[cPaneSide] do
   begin