Hi, we are @leona-ya and @RossComputerGuy, the release managers for NixOS 25.05 ("Warbler").

We're happy to announce the kickoff of the release schedule. So, it's time to discuss the feature freeze. We want to ensure that this release is as stable and reliable as possible, and your contributions are crucial to achieving that goal, here are the two upcoming dates in that context:

• 2025-04-09 Restrict breaking changes to Release Critical Packages
• 2025-04-23 Restrict all breaking changes

The first restriction will be in place quite soon, therefore, we encourage all teams to check in now and mention possible blockers, so we get a good overview of what's ahead.

Whether you were pinged or not, we encourage everyone to create issues for release blockers and add them to the 25.05 Blockers project.

Check-in

Please comment your status quo and possible issues as soon as possible. We'll check teams once they have checked in.

If you think some subsystem, person or team should be added or removed from this list, update maintainers/team-list.nix in time before the next feature freeze announcement.

Core

• Module system: @infinisil, @roberth
• stdenv: @NixOS/stdenv, @Artturin, @emilazy, @Ericson2314, @philiptaron, @reckenrode, @RossComputerGuy
• systemd: @NixOS/systemd
• NixOS tests: @tfc

Platforms

• Darwin: @NixOS/darwin-core, @emilazy, @reckenrode, @toonn

Languages Ecosystem

• BEAM (Erlang): @NixOS/beam, @ankhers, @Br1ght0ne, @DianaOlympos, @gleber, @happysalada, @minijackson, @yurrriq
• C: @matthewbauer, @Mic92
• Coq: @CohenCyril, @Zimmi48, @siraben, @vbgl, @Alizter, @stepbrobd
• Dhall: @Gabriella439, @ehmry
• Go: @NixOS/golang, @kalbasit, @katexochen, @Mic92, @zowoq, @qbit, @mfrw
• Haskell: @NixOS/haskell, @cdepillabout, @maralorn, @sternenseemann
• Java: @NixOS/java, @chayleaf, @FliegendeWurst, @Infinidoge, @tomodachi94
• lisp: @NixOS/lisp, @7c6f434c, @lukego, @nagy, @Uthar, @hraban
• lua: @NixOS/lua
• Node.js: @winterqt
• OCaml: @NixOS/ocaml, @Alizter
• Perl: @stigtsp, @marcusramberg, @zakame
• PHP: @NixOS/php, @aanderse, @drupol, @Ma27, @piotrkwiecinski, @talyz
• Python: @mweinelt, @natsukium
• R: @b-rodrigues, @bcdarwin, @jbedo, @Kupac
• Ruby:
• Rust: @NixOS/rust, @figsoda, @Mic92, @tjni, @winterqt, @zowoq
• Zig: @figsoda, @RossComputerGuy

Compilers, build systems

• Android: @NixOS/android, @adrian-gierakowski, @hadilq, @johnrtitor, @numinit, @RossComputerGuy
• Bazel: @mboes, @uri-canva, @avdv, @olebedev, @groodt, @aherrmann, @ylecornec
• LLVM: @NixOS/llvm, @dtzWill, @Ericson2314, @lovek323, @alyssais, @RossComputerGuy, @rrbutani, @sternenseemann

Desktop environments

• Cinnamon: @bobby285271, @mkg20001
• DDE: @wineee
• Enlightenment: @NixOS/enlightenment, @romildo
• GNOME: @NixOS/gnome, @bobby285271, @hedning, @jtojnar, @dasj19
• Hyprland: @NixOS/hyprland, @donovanglover, @fufexan, @johnrtitor, @khaneliman, @NotAShelf
• Lomiri: @OPNA2608
• Lumina: @NixOS/lumina, @romildo
• LXQt: @NixOS/lxqt, @romildo
• MATE: @bobby285271, @johannesloetzsch, @romildo
• Pantheon: @NixOS/pantheon, @davidak, @bobby285271
• Qt / KDE: @NixOS/qt-kde, @ilya-fedin, @K900, @LunNova, @mjm, @NickCao, @SuperSandro2000, @ttuegel
• Xfce: @bobby285271, @romildo, @muscaln

Programs

• ACME: @aanderse, @arianvp, @emilazy, @flokli, @m1cr0man
• CloudPosse: @dudymas
• Geospatial: @NixOS/geospatial, @autra, @imincik, @l0b0, @nh2, @nialov, @sikmir, @willcohen
• Lix ecosystem: @RaitoBezarius, @Qyriad
• Nix/nix-cli ecosystem: @NixOS/nix-team
• PostgreSQL: @thoughtpolice, @Ma27, @wolfgangwalther
• Xen Project Hypervisor: @NixOS/xen-project, @hehongbo, @CertainLach, @SigmaSquadron

Everyone else:

@NixOS/nixpkgs-committers, @NixOS/release-engineers

• Docs: @NixOS/documentation-team
• Marketing: @tomberek