shell.nix: provide adafruit-nrfutil

[mweinelt]

This is marked unfree in nixpkgs upstream, which is something we need to explicitly allow in our shell.

Then we need to permit CVE-2024-23342 in ecdsa, a timing security issue which upstream does not plan to resolve, but isn't relevant to the use of adafruit-nrfutil at all.

The switch to mkShellNoCC makes the shell closure smaller, since it does not include the nixpkgs stdenv.

Renamed from default.nix, as shell.nix is the cleaner name for when the entrypoint is a nix shell. This does not require changes to the direnv configuration.

This increases the shell closure from 21.55 MiB to 21.66 MiB.

cc @neutralinsomniac

[neutralinsomniac]

Thanks for the CC. I'll test this later today when I'm home :)

…

On Sat, Apr 4, 2026, at 12:44, Martin Weinelt wrote: This is marked unfree in nixpkgs upstream, which is something we need to explicitly allow in our shell. Then we need to permit CVE-2024-23342 <https://github.com/advisories/GHSA-wj6h-64fc-37mp> in ecdsa, a timing security issue which upstream does not plan to resolve, but isn't relevant to the use of adafruit-nrfutil at all. The switch to `mkShellNoCC` makes the shell closure smaller, since it does not include the nixpkgs stdenv. Renamed from default.nix, as shell.nix is the cleaner name for when the entrypoint is a nix shell. This does not require changes to the direnv configuration. cc @neutralinsomniac <https://github.com/neutralinsomniac> You can view, comment on, or merge this pull request online at: #2251 Commit Summary • 46eba9e <46eba9e> shell.nix: provide adafruit-nrfutil File Changes (2 files <https://github.com/meshcore-dev/MeshCore/pull/2251/files>) • *D* default.nix <https://github.com/meshcore-dev/MeshCore/pull/2251/files#diff-245563af9e34754739b12b294f3324c1d42c116ace7ce8735e21dfbc82d8e064> (11) • *A* shell.nix <https://github.com/meshcore-dev/MeshCore/pull/2251/files#diff-e53dfbfffe62ae3c0b411b3938ccffa9fb6a2ecc565f55785ef8daa756631a6b> (23) Patch Links: • https://github.com/meshcore-dev/MeshCore/pull/2251.patch • https://github.com/meshcore-dev/MeshCore/pull/2251.diff — Reply to this email directly, view it on GitHub <#2251>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAAWPJ4NQE4INDKBZW3GE7L4UE3YXAVCNFSM6AAAAACXMXLRKOVHI2DSMVQWIX3LMV43ASLTON2WKOZUGIYDKMRYGY3TKNA>. You are receiving this because you were mentioned.Message ID: ***@***.***>

[neutralinsomniac]

Looks good to me and worked fine!