coconut: fix build (#430948)

pkgs/development/python-modules/coconut/default.nix

···
   pexpect,
   pygments,
   pytestCheckHook,
+  pythonAtLeast,
   prompt-toolkit,
   setuptools,
   tkinter,
···
     tag = "v${version}";
     hash = "sha256-Vd6ZY3PlbPOy63/0/0YJ1U2PpsVdctOoInyKftj//cM=";
   };
+
+  disabled = pythonAtLeast "3.13";
 
   nativeBuildInputs = [ setuptools ];
 

pkgs/top-level/all-packages.nix

···
 
   fedora-backgrounds = callPackage ../data/misc/fedora-backgrounds { };
 
-  coconut = with python3Packages; toPythonApplication coconut;
+  coconut = with python312Packages; toPythonApplication coconut;
 
   coolreader = libsForQt5.callPackage ../applications/misc/coolreader { };