commit 6dbc44e8109c30a6523e0543a7ced88777e3d1dd
Merge: ebc05ccbb4d0 db07b2139708
Author: Vladimír Čunát <v@cunat.cz>
Date:   Sun Mar 23 18:54:15 2025 +0100

    tzdata: 2025a -> 2025b (#392462)

commit db07b21397089d01aebfe736181947ba65a9b42c
Author: Sergei Trofimovich <slyich@gmail.com>
Date:   Sun Mar 23 06:30:20 2025 +0000

    tzdata: 2025a -> 2025b
    
    Changes: https://github.com/eggert/tz/compare/2025a...2025b
    (cherry picked from commit 0e22650f6956c978a4dc68bfb3bb8c40b78070c1)

commit ebc05ccbb4d0342242fbae049aef758dce1e2808
Merge: 017303ab3b6f 4652098e774d
Author: Vladimír Čunát <v@cunat.cz>
Date:   Sun Mar 23 18:52:21 2025 +0100

    tzdata: 2024b -> 2025a (#392460)

commit 4652098e774d130001e046737792ffde1122c5ce
Author: Sergei Trofimovich <slyich@gmail.com>
Date:   Sat Jan 18 06:11:58 2025 +0000

    tzdata: 2024b -> 2025a
    
    Changes: https://github.com/eggert/tz/blob/2025a/NEWS
    (cherry picked from commit 892f0edfb10f1b74bc2bf6fa2b49eef170819b0f)

ical> E FileNotFoundError: [Errno 2] No such file or directory: '/nix/store/zpkj9lmgkrcinkwa9k458viszgmncx29-python3.12-tzdata-2024.2/lib/python3.12/site-packages/tzdata/zoneinfo/America/Coyhaique'

I'm using this hack that requires no recompilation for my own setup, the PR was just so others didn't run into the same issue :)

    nixpkgs.overlays = [
      (final: prev: {
        pythonPackagesExtensions = (prev.pythonPackagesExtensions or [ ]) ++ [
          (pfinal: pprev: {
            ical = pprev.ical.override {
              tzdata = pprev.tzdata.overrideAttrs (
                tfinal: tprev: rec {
                  pname = "tzdata";
                  version = "2025.2";

                  src = prev.fetchPypi {
                    inherit pname version;
                    hash = "sha256-tgpjj8wNr/rfgv4PV+U9Br3sLzbE32YoCuebzmvW8rk=";
                  };

                }
              );
            };
          })
        ];
      })
    ];