- `retroarch` has been refactored and the older `retroarch.override { cores = [ ... ]; }` to create a RetroArch derivation with custom cores doesn't work anymore, use `retroarch.withCores (cores: [ ... ])` instead. If you need more customization (e.g.: custom settings), use `wrapRetroArch` instead.
- `borgmatic` has been updated from 1.8.14 to 1.9.5, please check the [upstream changelog](https://projects.torsion.org/borgmatic-collective/borgmatic/releases) for more details, especially for a few possibly breaking changes noted in the [1.9.0 changelog](https://projects.torsion.org/borgmatic-collective/borgmatic/releases/tag/1.9.0).
- `nodePackages.ganache` has been removed, as the package has been deprecated by upstream.
- `matomo` now defaults to version 5 (previously available as `matomo_5`). Version 4 has been removed as it reached EOL on December 19, 2024.
- `matomo-beta` has been removed as the version of the `matomo` package can now be easily overridden through `overrideAttrs` (see [PR #374022](https://github.com/NixOS/nixpkgs/pull/374022))
- `docker_24` has been removed, as it was EOL with vulnerabilities since June 08, 2024.
- Emacs 28 and 29 have been removed.
- Emacs 28 Macport has been removed, while CVEs of Emacs 29 Macport are patched.
- `containerd` has been updated to v2, which contains breaking changes. See the [containerd
2.0](https://github.com/containerd/containerd/blob/main/docs/containerd-2.0.md) documentation for more
details.
- The `tinycc` package now has the `dev`, `doc` and `lib` outputs, thus,
`tinycc.out` may now only provide the tcc and cross compilers binaries.
- The `testTarget` argument of `haskellPackages.mkDerivation` has been deprecated in favour of `testTargets`.
`testTarget` took a space separated string of targets, whereas the new `testTargets` argument takes a list of targets.
For instance, `testTarget = "foo bar baz"` should become `testTargets = [ "foo" "bar" "baz" ]`.
- `rustPlatform.buildRustPackage` stops handling the deprecated argument `cargoSha256`. Out-of-tree packages that haven't migrated from `cargoSha256` to `cargoHash` now receive errors.
- `nodePackages.stackdriver-statsd-backend` has been removed, as the StackDriver service has been discontinued by Google, and therefore the package no longer works.
- `python3Packages.opentracing` has been removed due to being unmaintained upstream. [OpenTelemetry](https://opentelemetry.io/) is the recommended replacement.
- the notmuch vim plugin now lives in a separate output of the `notmuch`
package. Installing `notmuch` will not bring the notmuch vim package anymore,
add `vimPlugins.notmuch-vim` to your (Neo)vim configuration if you want the
vim plugin.
- `prisma` and `prisma-engines` have been updated to version 6.7.0, which
introduces several breaking changes. See the
[Prisma ORM upgrade guide](https://www.prisma.io/docs/orm/more/upgrade-guides/upgrading-versions/upgrading-to-prisma-6)
for more information.
- `dependency-track` no longer bundes the UI inside the jar. This bundling
functionality is deprecated by upstream and causes UI assets not being served
after weeks of runtime.
- `nq` was updated to 1.0, which renames the `fq` and `tq` utilities to `nqtail` and `nqterm` respectively.
- `zf` was updated to 0.10.2, which includes breaking changes from the [0.10.0 release](https://github.com/natecraddock/zf/releases/tag/0.10.0).
`zf` no longer does Unicode normalization of the input and no longer supports terminal escape sequences in the `ZF_PROMPT` environment variable.
- `confluent-cli` was updated from 3.60.0 to 4.16.0, which includes several breaking changes as detailed in [Confluent's release notes](https://docs.confluent.io/confluent-cli/current/release-notes.html).
- `siduck76-st` has been renamed to `st-snazzy`, like the project's [flake](https://github.com/siduck/st/blob/main/flake.nix).
- `python3Packages.jax` now directly depends on `python3Packages.jaxlib`.
As a result, packages that depend on jax no longer need to include jaxlib to their dependencies.