TWIN: This week, sparked from a discussion in the contribution channel https://matrix.to/#/!kjdutkOsheZdjqYmqp:nixos.org/$TyVnavWN3waTSaNOm0dT8V0q9Xmef0x1Tin-roaD_hU?via=nixos.org&via=matrix.org&via=nixos.dev about Musl https://musl.libc.org/, an alternative libc to glibc and its support in Nixpkgs.

I proposed as a takeaway https://matrix.to/#/!kjdutkOsheZdjqYmqp:nixos.org/$7lx9_zRf1xXuKv812u7ouhHLr0psuT3R-i7NEPvdQm8?via=nixos.org&via=matrix.org&via=nixos.dev that it would be interesting to see more CI checks in the form of passthru.tests.* on various relevant packages to https://spectrum-os.org/ which is a Nix-derivative operating system using Musl.

In addition to that, if troubles arise while supporting a package due to Musl tests, the group of folks in @NixOS/static could intervene and provide guidance on how to proceed.

Note that static builds in Nixpkgs are offered via static musl builds, this could be done using glibc but this infrastructure for static builds does not exist in nixpkgs. Moreover, according to the appendix in RFC 046 (https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md), x86_64-linux + musl + gcc is a tier 3 platform. Static musl is a tier 4 platform on x86_64-linux.

If you want to see this change, please chime in the discussion and offer your help to the people working on musl in nixpkgs.