rust: 1.87.0 -> 1.88.0

[valentinegb]

Release notes: https://github.com/rust-lang/rust/releases/tag/1.88.0

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• Nixpkgs 25.11 Release Notes (or backporting 24.11 and 25.05 Nixpkgs Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
• NixOS 25.11 Release Notes (or backporting 24.11 and 25.05 NixOS Release notes)
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md, pkgs/README.md, maintainers/README.md and other contributing documentation in corresponding paths.

---

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[zowoq]

Built fd on x86_64-darwin, aarch64-darwin, aarch64-linux.

[Redhawk18]

built cargo on x86_64-linux

[ozwaldorf]

Built and ran lutgen and eza on x86_64-linux

[alyssais]

Have we given up on the normal checklist for Rust updates?

nixpkgs/pkgs/development/compilers/rust/1_88.nix

Lines 1 to 10 in 3dc866c

	# New rust versions should first go to staging.
	# Things to check after updating:
	# 1. Rustc should produce rust binaries on x86_64-linux, aarch64-linux and x86_64-darwin:
	# i.e. nix-shell -p fd or @GrahamcOfBorg build fd on github
	# This testing can be also done by other volunteers as part of the pull
	# request review, in case platforms cannot be covered.
	# 2. The LLVM version used for building should match with rust upstream.
	# Check the version number in the src/llvm-project git submodule in:
	# https://github.com/rust-lang/rust/blob/<version-tag>/.gitmodules
	# 3. Firefox and Thunderbird should still build on x86_64-linux.

[zowoq]

Have we given up on the normal checklist for Rust updates?

#407444, #395734?

[alyssais]

Let's clean up that comment then?

[valentinegb]

Have we given up on the normal checklist for Rust updates?

nixpkgs/pkgs/development/compilers/rust/1_88.nix

Lines 1 to 10 in 3dc866c

	# New rust versions should first go to staging.
	# Things to check after updating:
	# 1. Rustc should produce rust binaries on x86_64-linux, aarch64-linux and x86_64-darwin:
	# i.e. nix-shell -p fd or @GrahamcOfBorg build fd on github
	# This testing can be also done by other volunteers as part of the pull
	# request review, in case platforms cannot be covered.
	# 2. The LLVM version used for building should match with rust upstream.
	# Check the version number in the src/llvm-project git submodule in:
	# https://github.com/rust-lang/rust/blob/<version-tag>/.gitmodules
	# 3. Firefox and Thunderbird should still build on x86_64-linux.

Are any of those checks not satisfied?

[alyssais]

Who built Firefox and Thunderbird?

[valentinegb]

You're right, I don't think that's been done, sorry. I'm on aarch64-darwin but I believe I could set up linux-builder and try building Firefox and Thunderbird for x86_64-linux, if that's still something that should be done. Forgive me, this is my first merged contribution after all ^^'

[alyssais]

It's okay — it wasn't your responsibility necessarily anyway, and I don't think checking that in advance has been worth the amount of time it's taken per update anyway, at least for the last few years, and evidently the other maintainers who haven't been doing it for the last few updates agree. So let's just drop it: #421017

Thank you for your contribution. :)

[nixpkgs-ci]

Backport failed for release-25.05, because it was unable to cherry-pick the commit(s).

Please cherry-pick the changes locally and resolve any conflicts.

git fetch origin release-25.05
git worktree add -d .worktree/backport-420390-to-release-25.05 origin/release-25.05
cd .worktree/backport-420390-to-release-25.05
git switch --create backport-420390-to-release-25.05
git cherry-pick -x 3dc866c475dd680885594c9c773933072e849eab