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perf(deploy): force the unused audio stack off

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The block enabling pipewire was commented "for transaction sounds", but
no such sounds exist: nothing under apps/machine or packages/ constructs
an Audio element or ships an audio file. It has been dead weight for as
long as it has been there.

Removing our own `enable = true` is not enough. services.xserver pulls
in NixOS's graphical-desktop module, which mkDefault-enables pipewire
exactly as it does speechd, so the stack survived the first attempt at
this. That is why the line sits beside the speechd mkForce rather than
where the old block was.

Most of PipeWire's dependency chain is shared with the GStreamer that
Electron drags in, and that stays in the closure either way, so this
frees 21MB rather than the whole stack. The remainder comes out with
gtk4/gst, which wants a launch test on the sintra first.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
This commit is contained in:
Padreug 2026-09-24 15:27:06 +02:00
commit cda3f3f17e
1 changed files with 11 additions and 8 deletions
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19
deploy/nixos/configuration.nix
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@ -13,7 +13,18 @@
# - speechd: text-to-speech (speech-dispatcher → espeak-ng → mbrola, ~1GB). # - speechd: text-to-speech (speech-dispatcher → espeak-ng → mbrola, ~1GB).
# An ATM does not talk. # An ATM does not talk.
# - documentation: man/info/NixOS manual — no one reads them on a kiosk. # - documentation: man/info/NixOS manual — no one reads them on a kiosk.
# - pipewire: the audio stack (+ WirePlumber, ALSA, the PulseAudio shim),
# ~353MB. The app has never played a sound — nothing under apps/machine or
# packages/ constructs an Audio element or ships an audio file.
#
# All three need mkForce, not just an absent/false assignment: enabling
# services.xserver pulls in NixOS's `graphical-desktop` module, which
# mkDefault-enables speechd AND pipewire (services/misc/graphical-desktop.nix).
# Dropping our own `enable = true` simply falls back to that default — the
# 353MB stayed until this was forced off. Re-enable pipewire (with alsa +
# pulse) and security.rtkit if transaction sounds are ever added.
services.speechd.enable = lib.mkForce false; services.speechd.enable = lib.mkForce false;
services.pipewire.enable = lib.mkForce false;
documentation.enable = false; documentation.enable = false;
documentation.nixos.enable = false; documentation.nixos.enable = false;
@ -99,14 +110,6 @@
user = "bitspire"; user = "bitspire";
}; };
# Audio (for transaction sounds)
security.rtkit.enable = true;
services.pipewire = {
enable = true;
alsa.enable = true;
pulse.enable = true;
};
# System packages # System packages
environment.systemPackages = with pkgs; [ environment.systemPackages = with pkgs; [
# System utilities # System utilities