glibc and stock packages

flake.nix selects nixpkgs' standard x86_64-linux and aarch64-linux platforms. The NixOS configuration uses nixpkgs' stock glibc packages. Its only overlay adds this repository's own packages and patches GTK and Qt, as GTK and Qt on a phone describes. ShellCheck and the package-generated documentation, for example, keep nixpkgs' defaults. glibc's NSS lets GDM and ordinary account lookups see systemd-homed users through nss-systemd and the configured nscd forwarder.

Everything the overlay builds itself links with mold instead of nixpkgs' default ld.bfd. That covers derisk, pm and its plugins, losos-installer, losos-security, losos-swap, losos-adblock, the LosOS client losos, Danube, x2mcsapi, libhybris, and the patched GTK and Qt. The overlay calls them through one helper, callWithMold. It gives a package nixpkgs' stdenv and a rustPlatform built on it, both through stdenvAdapters.useMoldLinker, so the C compiler and the cc that rustc links with both pass -fuse-ld=mold. A package added later links with mold just by being called through the helper, and there is no list to keep. WPE WebKit, which Danube draws, is built from nixpkgs' own package set and keeps its linker. Packages taken from nixpkgs unchanged keep its linker too, because giving them a different stdenv would mean none of them substitute from cache.nixos.org.