lowdown: 1.3.2 -> 2.0.2, nixVersions.nix_2_24: fix build against lowdown 2.0.2; lix: apply patches for lowdown >= 1.4

[xokdvium]

Things done

Supersedes #368499. lowdown itself needs a switch from gmake to bmake because upstream has started using FreeBSD dialect.

Draft because lix will fail to build. @RaitoBezarius, @lf- how should we go about this? Would pinning to lowdown_1_3 be preferable or could lix get a patch similar to @trofi's NixOS/nix#12115 backported?

• 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.

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[RaitoBezarius]

Thanks for pinging us, I will be able to tend to this only starting next week if that's OK. If this is urgent, please let me know.

[xokdvium]

@RaitoBezarius thanks! There's no rush at all. The only major consumers of lowdown are just lix/nix so we can take our time here.

[roberth]

Seems ok on the Nix side. Lix also good to merge?