diff --git a/deploy/nixos/configuration.nix b/deploy/nixos/configuration.nix
index d473a42..2306f5a 100644
--- a/deploy/nixos/configuration.nix
+++ b/deploy/nixos/configuration.nix
@@ -7,6 +7,16 @@
   # System basics
   system.stateVersion = "24.05";
 
+  # ── Image slimming (bitspire#70 sizing) ──────────────────────────────
+  # This is a single-purpose Electron kiosk; strip the desktop/multimedia
+  # baggage NixOS pulls in by default so the disk image stays lean.
+  # - speechd: text-to-speech (speech-dispatcher → espeak-ng → mbrola, ~1GB).
+  #   An ATM does not talk.
+  # - documentation: man/info/NixOS manual — no one reads them on a kiosk.
+  services.speechd.enable = lib.mkForce false;
+  documentation.enable = false;
+  documentation.nixos.enable = false;
+
   # Networking
   networking = {
     hostName = "bitspire";
@@ -121,8 +131,10 @@
     # Node.js for the application
     pkgs-unstable.nodejs_22
 
-    # Camera support
-    v4l-utils
+    # Camera support. v4l-utils' default build drags in the whole Qt6 stack
+    # for its qv4l2 GUI (~0.5GB) — we only ever use the v4l2-ctl CLI, so drop
+    # the GUI.
+    (v4l-utils.override { withGUI = false; })
     fswebcam
 
     # ATM operations