• https://github.com/NixOS/nixpkgs/pull/451665
• https://github.com/NixOS/nixpkgs/pull/451147
• https://github.com/NixOS/nixpkgs/pull/447166
• https://github.com/NixOS/nixpkgs/pull/445833

ElvishJerricco:

❯ /nix/store/d5xywf1k4cmmr2jlxmsc5qa6zcwn3myd-nixos-vm/bin/run-nixos-vm -nographic
[    0.582586] (udev-worker)[90]: mtd0ro: Failed to find and pin callout binary "/nix/store/p9vl1dd3qjafk36wsb49q79a2rhjrpbi-systemd-258/lib/udev/mtd_probe": No such file or directory
[    0.880121] (udev-worker)[94]: hidraw0: Failed to find and pin callout binary "/nix/store/p9vl1dd3qjafk36wsb49q79a2rhjrpbi-systemd-258/lib/udev/fido_id": No such file or directory
[    0.886137] (udev-worker)[97]: hidraw1: Failed to find and pin callout binary "/nix/store/p9vl1dd3qjafk36wsb49q79a2rhjrpbi-systemd-258/lib/udev/fido_id": No such file or directory
[    3.416831] systemd[1]: Failed to preset unit: Unit autovt@.service does not exist

user: matthew nixos-musl on  refactor [!] 
✦ ❯ nix path-info -Sh `readlink ./result`
/nix/store/gzv6h1zjghv7mph64wwfzcqvywmhqfpz-nixos-system-nixos-25.11.20251015.ac6f169	444.6 MiB

user: matthew nixos-musl on  refactor [!] 
✦ ❯ nix build .#nixosConfigurations.gnu-musl-llvm.config.system.build.toplevel --keep-going 
warning: Git tree '/home/matthew/git/nixos-musl' is dirty
evaluation warning: system.stateVersion is not set, defaulting to 25.11. Read why this matters on https://nixos.org/manual/nixos/stable/options.html#opt-system.stateVersion.
Finished at 22:26:13 after 3s

user: matthew nixos-musl on  refactor [!] took 3s 
✦ ❯ nix path-info -Sh `readlink ./result`
/nix/store/29ic0hjnydm8w7g172jfz72484bwd75s-nixos-system-nixos-25.11.20251015.ac6f169	413.7 MiB

DBI-aarch64-linux> /nix/store/bvp4jwn1ibkjh7yhr2mlcxxd908y4x4v-perl-5.40.0/lib/perl5/5.40.0/aarch64-linux-thread-multi/CORE/perl.h:3358:22: error: unknown type name 'off64_t'; did you mean 'off_t'?
DBI-aarch64-linux>  3358 | #       define Off_t off64_t
DBI-aarch64-linux>       |                      ^~~~~~~
DBI-aarch64-linux> /nix/store/bvp4jwn1ibkjh7yhr2mlcxxd908y4x4v-perl-5.40.0/lib/perl5/5.40.0/aarch64-linux-thread-multi/CORE/perlio.h:252:15: note: in expansion of macro 'Off_t'
DBI-aarch64-linux>   252 | PERL_CALLCONV Off_t PerlIO_tell(PerlIO *);

FAILED: [code=1] libnixutil.so.p/unix_file-descriptor.cc.o 
aarch64-unknown-linux-musl-clang++ -Ilibnixutil.so.p -I. -I.. -Iinclude -I../include -I../widecharwidth -Ilinux/include -I../linux/include -Iunix -I../unix -Iunix/include -I../unix/include -I/nix/store/2kq21fj8mcqbb2dk078kdkz0a4slp9y9-libarchive-aarch64-unknown-linux-musl-3.8.1-dev/include -I/nix/store/15nrd5ki3mn2wky0879jq6p8v3nl3ins-nlohmann_json-aarch64-unknown-linux-musl-3.12.>
../unix/file-descriptor.cc:174:20: error: use of undeclared identifier 'SYS_close_range'; did you mean 'unix_close_range'?
  174 |     return syscall(SYS_close_range, first, last, (unsigned int) flags);
      |                    ^~~~~~~~~~~~~~~
      |                    unix_close_range
../unix/file-descriptor.cc:171:12: note: 'unix_close_range' declared here
  171 | static int unix_close_range(unsigned int first, unsigned int last, int flags)
      |            ^
../unix/file-descriptor.cc:174:12: error: no matching function for call to 'syscall'
  174 |     return syscall(SYS_close_range, first, last, (unsigned int) flags);
      |            ^~~~~~~
/nix/store/4w3bhgsi1al9v1jwgk9vc6ch20l7ynba-musl-aarch64-unknown-linux-musl-1.2.5-dev/include/unistd.h:180:6: note: candidate function not viable: no known conversion from 'int (unsigned int, unsigned int, int)' to 'long' for 1st argument
  180 | long syscall(long, ...);
      |      ^       ~~~~
2 errors generated.