been renamed from `ps3netsrv++` to `ps3netsrv` and cli parameters have
  changed.

- `ssm-agent` package and module were renamed to `amazon-ssm-agent` to be
  consistent with the upstream package name.

- `services.kea.{ctrl-agent,dhcp-ddns,dhcp,dhcp6}` now use separate runtime
  directories instead of `/run/kea` to work around the runtime directory being
  cleared on service start.

- `mkDerivation` rejects MD5 hashes now.

- The `junicode` font package has been updated to [major
  v2](https://github.com/psb1558/Junicode-font/releases/tag/v2.001), which is
  a font family now. In particular, plain `Junicode.ttf` no longer exists. In
  addition, TrueType font files are now placed in `font/truetype` instead of
  `font/junicode-ttf`; this change does not affect use via `fonts.packages`
  option.

- The `prayer` package as well as `services.prayer` have been removed because
  it's been unmaintained for several years and the author's website has
  vanished.

- The `chrony` NixOS module now tracks the real-time clock drift from the
  system clock with `rtcfile` and automatically adjusts it with `rtcautotrim`
  when it exceeds the maximum error specified in
  `services.chrony.autotrimThreshold` (defaults to 30 seconds). If you enabled
  `rtcsync` in `extraConfig`, you should remove RTC related options from
  `extraConfig`. If you do not want chrony configured to keep the RTC in check,
  you can set `services.chrony.enableRTCTrimming = false;`.

- `trilium-desktop` and `trilium-server` have been updated to
  [v0.61](https://github.com/zadam/trilium/releases/tag/v0.61.12). For existing
  installations, upgrading to this version is supported only after running
  v0.60.x at least once. If you are still on an older version, make sure to
  update to v0.60 (available in NixOS 23.05) first and only then to v0.61
  (available in NixOS 23.11).

- Cassandra now defaults to v4.x, updated from v3.11.x.


- FoundationDB now defaults to major version 7.

- [glibc](https://www.gnu.org/software/libc/) has been updated from v2.37 to
  v2.38. Refer to the [the release
  notes](https://sourceware.org/glibc/wiki/Release/2.38) for more details.

- `linuxPackages_testing_bcachefs` is now soft-deprecated by
  `linuxPackages_testing`.
  - Please consider changing your NixOS configuration's `boot.kernelPackages`
    to `linuxPackages_testing` until a stable kernel with bcachefs support is
    released.

- PostgreSQL now defaults to major version 15.

- All [ROCm](https://rocm.docs.amd.com/en/latest/) packages have been updated
  to v5.7.0.
  - [ROCm](https://rocm.docs.amd.com/en/latest/) package attribute sets are
    versioned: `rocmPackages` -> `rocmPackages_5`.

- [systemd](https://systemd.io) has been updated from v253 to v254, refer to
  [the release
  notes](https://github.com/systemd/systemd/blob/v254/NEWS#L3-L659) for more
  details.
    - `boot.resumeDevice` **must be specified** when hibernating if not in EFI
      mode.
    - systemd may warn your system about the permissions of your ESP partition
      (often `/boot`), this warning can be ignored for now, we are looking into
      a satisfying solution regarding this problem.
    - Updating with `nixos-rebuild boot` and rebooting is recommended, since in
      some rare cases the `nixos-rebuild switch` into the new generation on a
      live system might fail due to missing mount units.

- If the user has a custom shell enabled via `users.users.${USERNAME}.shell =
  ${CUSTOMSHELL}`, the assertion will require them to also set
  `programs.${CUSTOMSHELL}.enable = true`. This is generally safe behavior, but
  for anyone needing to opt out from the check
  `users.users.${USERNAME}.ignoreShellProgramCheck = true` will do the job.

- `yarn-berry` has been updated to v4.0.1. This means that NodeJS versions less
  v18.12 are no longer supported by it. Refer to the [upstream
  changelog](https://github.com/yarnpkg/berry/blob/master/CHANGELOG.md) for
  more details.

- GNOME has been updated to v45. Refer to the [release