Run per-host/per-package nix eval and dry-run build concurrently

codex-maintenance.sh evaluated each affected host/package one at a time,
even though those calls are independent. Added scripts/lib/nix-parallel.sh
(run_nix_parallel) and wired it into the host-eval, package-eval, and
dry-run-build loops.

Concurrency defaults to core count capped by available memory (~1GB/job)
rather than plain nproc: empirically, nproc-many concurrent full-flake
evals OOM-killed each other on a 4GB/6-core box, while 3-4 ran clean and
were still ~2x faster than serial. Override via NIX_PARALLEL_JOBS.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.sops.yaml

@@ -12,6 +12,7 @@ keys:
   - &lxc-gui age190htw7prp4vln076dxjx3gxxaq06h0zl0te7cqgpx79vl3lhkaes8suy05
   - &proxmox-server age1ukpqxzl44mnjpy5r96sfuc5sqzm47u4k8ujjh5qdgy6jvl9uqgpspymqfk
   - &vm-server age15kh7akxlx7zn00tey79rq2g8lgs4j5y77rcnyfxrxap8ckfu0a9sqvtdhh
+  - &baremetal-gui age1ehkswwz2pqaz4svzh7ela5tdnssl8kn6d4vwwxd6zwg8exfpd43syyrrjp
 
 creation_rules:
   # Shared across every currently-deployed host: root/nixos password hash,
@@ -34,6 +35,7 @@ creation_rules:
           - *lxc-gui
           - *proxmox-server
           - *vm-server
+          - *baremetal-gui
 
   - path_regex: secrets/nix-cache\.yaml$
     key_groups:
@@ -55,3 +57,16 @@ creation_rules:
       - age:
           - *admin
           - *docker
+
+  # gui-host-specific secrets (currently: wifi-password, see
+  # modules/networking/wifi.nix). Only *lxc-gui has a registered key today
+  # -- proxmox-gui/linode-gui/baremetal-gui haven't been provisioned via
+  # scripts/secrets/sync-host-keys.sh yet, so whichever variant is actually
+  # deployed next needs its recipient added here (and `sops updatekeys` rerun)
+  # before it can decrypt this.
+  - path_regex: secrets/gui\.yaml$
+    key_groups:
+      - age:
+          - *admin
+          - *lxc-gui
+          - *baremetal-gui

CLAUDE.md

@@ -321,11 +321,14 @@ nixosSystem {
 }
 ```
 
-Platforms: `linode`, `proxmox`, `lxc`. Build types: `minimal`, `nix-cache`,
-`server`, `docker`, `gui`, `pxe-boot`, `tailscale-exit-node`, `tor-relay`. Not
-every combination is built — e.g. `pxe-boot` has no `linode` variant
-(PXE/DHCP/TFTP need LAN L2 adjacency a Linode VPS doesn't have), and
-`tor-relay` currently only exists as `lxc-tor-relay`. Treat `flake.nix`'s
+Platforms: `linode`, `proxmox`, `lxc`, `baremetal`. Build types: `minimal`,
+`nix-cache`, `server`, `docker`, `gui`, `pxe-boot`, `tailscale-exit-node`,
+`tor-relay`. Not every combination is built — e.g. `pxe-boot` has no `linode`
+variant (PXE/DHCP/TFTP need LAN L2 adjacency a Linode VPS doesn't have),
+`tor-relay` currently only exists as `lxc-tor-relay`, and `baremetal`
+currently only exists as `baremetal-gui` (the real gui-host hardware —
+see `hosts/nixos/host.nix` and `modules/platforms/baremetal.nix`). Treat
+`flake.nix`'s
 `generatedTargets` as the source
 of truth for which hosts exist — `README.md`, `AGENTS.md`,
 `docs/flake-lock-automation.md`, and the CI eval workflows
@@ -341,12 +344,16 @@ removing a host.
   of their own beyond narrow parameterized helpers (see
   `modules/beszel/host-token.nix` below) — all shared behavior comes from the
   platform/build-type modules composed in `flake.nix`, not from the host file.
-- `modules/platforms/{linode,proxmox,lxc}.nix` — platform-specific config:
-  boot method, guest tooling, and (for linode/proxmox) the hypervisor-specific
-  hardware config, imported directly by the platform module itself
-  (`../hardware-configuration/vm/{proxmox,linode}.nix`) — **not** wired in
-  from `flake.nix`. `lxc.nix` has no hardware-configuration counterpart since
-  containers share the host kernel; instead it imports nixpkgs' own
+- `modules/platforms/{linode,proxmox,lxc,baremetal}.nix` — platform-specific
+  config: boot method, guest tooling, and the hardware config, imported
+  directly by the platform module itself — **not** wired in from
+  `flake.nix`. VM platforms use `../hardware-configuration/vm/{proxmox,linode}.nix`;
+  `baremetal.nix` uses `../hardware-configuration/baremetal.nix` (adapted
+  from a real `nixos-generate-config` run on the actual hardware, not a
+  vm/ file, since it isn't a VM) plus `hardware.enableRedistributableFirmware
+  = true` for real wifi/GPU/microcode firmware that VMs never needed.
+  `lxc.nix` has no hardware-configuration counterpart since containers
+  share the host kernel; instead it imports nixpkgs' own
   `virtualisation/proxmox-lxc.nix`, which gives every `lxc-*` host a
   `config.system.build.tarball` output — a plain rootfs tarball, used as a
   `pct create ... vztmpl` CT template (**not** `pct restore`, which expects
@@ -370,6 +377,16 @@ removing a host.
   boots, so this declares them with `destroy = false` (disko never wipes
   them) and a bare `filesystem`/`swap` content type instead of a partition
   table — idempotent against an already-provisioned disk, never destructive.
+- `modules/disko/baremetal.nix` — `baremetal-gui`'s disko config: a ZFS
+  RAID0 (striped, no redundancy — disko's zpool `mode` defaults to `""`,
+  which is a plain stripe rather than `"mirror"`/`"raidz"`) root pool
+  across two disks, ESP + systemd-boot on the first. Device paths
+  (`vars.guiRootDisk1`/`guiRootDisk2`) are placeholders — fill in stable
+  `/dev/disk/by-id/...` paths before running disko for real.
+  `modules/platforms/baremetal.nix` also imports
+  `modules/services/zfs/enable-service.nix` for this (the `zfs_unstable`
+  package, autoScrub/autoSnapshot/trim) — the only other importer today is
+  `server`'s NFS data pool, an unrelated non-root ZFS use.
 - `modules/boot/efi.nix` — systemd-boot + EFI vars, paired with the disko module.
 - `modules/installer/` — the auto-installer environment (ISO, also served as
   PXE netboot): `common.nix` (shared config + the generated

README.md

@@ -8,13 +8,15 @@ workstation.
 Targets are named `<platform>-<buildtype>`, generated from two orthogonal
 pieces composed in `flake.nix`:
 
-- **Platforms** (what it runs on): `linode`, `proxmox`, `lxc`
+- **Platforms** (what it runs on): `linode`, `proxmox`, `lxc`, `baremetal`
 - **Build types** (what it's for): `minimal`, `nix-cache`, `server`, `docker`,
   `gui`, `pxe-boot`, `tailscale-exit-node`, `tor-relay`
 
 Not every combination exists — `pxe-boot` has no `linode` variant, since
-PXE/DHCP/TFTP need LAN L2 adjacency that a Linode VPS doesn't have, and
-`tor-relay` currently only exists as `lxc-tor-relay`. The full list:
+PXE/DHCP/TFTP need LAN L2 adjacency that a Linode VPS doesn't have,
+`tor-relay` currently only exists as `lxc-tor-relay`, and `baremetal`
+currently only exists as `baremetal-gui` (the real gui-host hardware). The
+full list:
 
 | Target | Purpose |
 | --- | --- |
@@ -25,6 +27,7 @@ PXE/DHCP/TFTP need LAN L2 adjacency that a Linode VPS doesn't have, and
 | `linode-server` / `proxmox-server` / `lxc-server` | Storage, NFS, backup, and monitoring exporter host — previously the flat `server` target |
 | `linode-docker` / `proxmox-docker` / `lxc-docker` | Docker host for the main container stack — previously the flat `docker` target |
 | `linode-gui` / `proxmox-gui` / `lxc-gui` | Cinnamon desktop workstation — previously the flat `nixos` target |
+| `baremetal-gui` | Same Cinnamon desktop workstation, on the real gui-host hardware — ZFS RAID0 root, systemd-boot |
 | `proxmox-pxe-boot` / `lxc-pxe-boot` | HTTP/iPXE boot asset host — previously the flat `pxe-boot` target |
 | `linode-tailscale-exit-node` / `proxmox-tailscale-exit-node` / `lxc-tailscale-exit-node` | Tailscale exit node |
 | `lxc-tor-relay` | Tor middle relay |
@@ -64,7 +67,7 @@ nix eval --json .#nixosConfigurations --apply builtins.attrNames | jq -r '.[]'
 | `variables.nix` | Single source of truth for shared values (LAN domain/CIDR, hostnames, timezone, primary username, storage root, NFS share subpaths/mountpoints, service ports, ...) — passed to every module and Home Manager config as the `vars` argument via `specialArgs`/`extraSpecialArgs` |
 | `hosts/<name>/host.nix` | Per-machine identity: hostname, hostId, per-machine secrets, `system.stateVersion` |
 | `hosts/nixos/home.nix` | Workstation-specific Home Manager config (used by the `gui` build type) |
-| `modules/platforms/` | Platform-specific config: virtualisation guest tools, boot method, hardware config (`linode.nix`, `proxmox.nix`, `lxc.nix`) |
+| `modules/platforms/` | Platform-specific config: virtualisation guest tools, boot method, hardware config (`linode.nix`, `proxmox.nix`, `lxc.nix`, `baremetal.nix`) |
 | `modules/build-types/` | Build-type-specific config: what makes a system minimal/server/docker/gui/pxe-boot/nix-cache |
 | `modules/common/` | Shared NixOS config, Home Manager, aliases imported by every host |
 | `modules/nix-cache/` | Binary cache and remote builder client/server modules |

flake.lock

@@ -95,11 +95,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1783740085,
-        "narHash": "sha256-qajyHfZY29G2oEQk+uHxmsJcRoBUBXP9maTpFlwP/dI=",
+        "lastModified": 1784350909,
+        "narHash": "sha256-ZWyzLbS1yKUTeFJLmdVuWNnHttL333/ldJbEE+KzCrM=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "3cd22efe6471dc7365c822bd9ad73a21e55f38fb",
+        "rev": "4ce190229c73d44536caa7072f6308fb2d8feeb3",
         "type": "github"
       },
       "original": {
@@ -147,11 +147,11 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1784011430,
-        "narHash": "sha256-lDebytrYdd47IBLwvNOD+6AGeoqZ78CIKlp70hzW280=",
+        "lastModified": 1784432872,
+        "narHash": "sha256-n3gKTBIV4ZA5VQpUakffBe3KGu4+mhPoA34rrqS0GkA=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "8eeec934ae0dbeca3d7868c059568a65c08b2fc3",
+        "rev": "fd1462031fdee08f65fd0b4c6b64e22239a77870",
         "type": "github"
       },
       "original": {

flake.nix

@@ -91,6 +91,7 @@
         linode-gui = mkTarget { platform = "linode"; buildType = "gui"; hostPath = ./hosts/nixos/host.nix; homeFile = ./hosts/nixos/home.nix; };
         proxmox-gui = mkTarget { platform = "proxmox"; buildType = "gui"; hostPath = ./hosts/nixos/host.nix; homeFile = ./hosts/nixos/home.nix; };
         lxc-gui = mkTarget { platform = "lxc"; buildType = "gui"; hostPath = ./hosts/nixos/host.nix; homeFile = ./hosts/nixos/home.nix; };
+        baremetal-gui = mkTarget { platform = "baremetal"; buildType = "gui"; hostPath = ./hosts/nixos/host.nix; homeFile = ./hosts/nixos/home.nix; };
 
         proxmox-pxe-boot = mkTarget { platform = "proxmox"; buildType = "pxe-boot"; hostPath = ./hosts/pxe-boot/host.nix; };
         lxc-pxe-boot = mkTarget { platform = "lxc"; buildType = "pxe-boot"; hostPath = ./hosts/pxe-boot/host.nix; };

hosts/nixos/host.nix

@@ -1,8 +1,17 @@
 _:
 
 {
+  imports = [
+    ../../modules/networking/wifi.nix
+  ];
+
   networking.hostName = "nixos";
 
+  # Only needed now that baremetal-gui exists (ZFS root) -- harmless on the
+  # ext4-rooted linode/proxmox/lxc-gui variants, so set unconditionally
+  # rather than only on the baremetal platform.
+  networking.hostId = "de6a9ffc";
+
   # Preserved from the pre-refactor `nixos` target — stateVersion must never
   # be bumped on an already-installed machine.
   system.stateVersion = "25.05";

modules/disko/baremetal.nix

@@ -0,0 +1,87 @@
+{ vars, ... }:
+
+{
+  # ZFS RAID0 (striped, no redundancy) root pool for the bare-metal gui
+  # host — two disks, each contributing its own top-level vdev. disko's
+  # zpool `mode` defaults to "" (plain stripe) when left unset, which is
+  # what gives RAID0 semantics here rather than mirror/raidz.
+  #
+  # Device paths are placeholders until the real hardware profile lands —
+  # fill in vars.guiRootDisk1/guiRootDisk2 (stable /dev/disk/by-id/...
+  # paths, not /dev/sdX) before running disko against real hardware. Swap
+  # is deliberately left out for now — sizing that sensibly needs the
+  # box's actual RAM size, which comes with the hardware profile too.
+  #
+  # Not yet imported anywhere: this awaits the new bare-metal platform
+  # module (alongside modules/boot/efi.nix for systemd-boot, matching
+  # modules/platforms/proxmox.nix's pattern) once the hardware config is
+  # in hand.
+  disko.devices = {
+    disk = {
+      disk1 = {
+        type = "disk";
+        device = vars.guiRootDisk1;
+
+        content = {
+          type = "gpt";
+
+          partitions = {
+            esp = {
+              priority = 1;
+              name = "ESP";
+              size = "512M";
+              type = "EF00";
+
+              content = {
+                type = "filesystem";
+                format = "vfat";
+                mountpoint = "/boot";
+                mountOptions = [ "umask=0077" ];
+              };
+            };
+
+            zfs = {
+              size = "100%";
+
+              content = {
+                type = "zfs";
+                pool = "rpool";
+              };
+            };
+          };
+        };
+      };
+
+      disk2 = {
+        type = "disk";
+        device = vars.guiRootDisk2;
+
+        content = {
+          type = "gpt";
+
+          partitions = {
+            zfs = {
+              size = "100%";
+
+              content = {
+                type = "zfs";
+                pool = "rpool";
+              };
+            };
+          };
+        };
+      };
+    };
+
+    zpool.rpool = {
+      type = "zpool";
+
+      rootFsOptions = {
+        compression = "zstd";
+        "com.sun:auto-snapshot" = "false";
+      };
+      mountpoint = "/";
+      options.ashift = "12";
+    };
+  };
+}

modules/hardware-configuration/baremetal.nix

@@ -0,0 +1,23 @@
+# Adapted from the output of `nixos-generate-config`, run from a live GUI
+# ISO boot on the actual gui-host hardware (AMD CPU). fileSystems and
+# swapDevices are deliberately omitted -- the live ISO had no formatted
+# disks to detect, and disko (modules/disko/baremetal.nix) generates both
+# from the declarative zpool layout anyway.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [
+      (modulesPath + "/installer/scan/not-detected.nix")
+    ];
+
+  boot = {
+    initrd.availableKernelModules = [ "xhci_pci" "ahci" "usbhid" "usb_storage" "sd_mod" ];
+    initrd.kernelModules = [ ];
+    kernelModules = [ "kvm-amd" ];
+    extraModulePackages = [ ];
+  };
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}

modules/networking/wifi.nix

@@ -0,0 +1,43 @@
+{ config, lib, vars, ... }:
+
+{
+  # Prestages a NetworkManager connection profile for vars.wifiSsid so the
+  # host associates on first boot with no manual nmtui/nmcli step. Guarded
+  # on a non-empty SSID so leaving the placeholder blank in variables.nix
+  # is a no-op rather than an empty, broken profile — fill it in once the
+  # network is known.
+  #
+  # The password itself lives in secrets/gui.yaml, not variables.nix --
+  # NetworkManager's ensureProfiles renders `psk = "$WIFI_PASSWORD"`
+  # literally into the store (see nixpkgs' own ensureProfiles example,
+  # which does the same for exactly this reason) and its systemd service
+  # envsubst-expands it from environmentFiles at activation time, so the
+  # real value only ever touches /run (root-only, UMask 0177), never the
+  # Nix store.
+  sops.secrets."wifi-password" = lib.mkIf (vars.wifiSsid != "") {
+    sopsFile = ../../secrets/gui.yaml;
+  };
+
+  sops.templates."wifi-password.env" = lib.mkIf (vars.wifiSsid != "") {
+    content = "WIFI_PASSWORD=${config.sops.placeholder."wifi-password"}";
+  };
+
+  networking.networkmanager.ensureProfiles = lib.mkIf (vars.wifiSsid != "") {
+    environmentFiles = [ config.sops.templates."wifi-password.env".path ];
+
+    profiles.${vars.wifiSsid} = {
+      connection = {
+        id = vars.wifiSsid;
+        type = "wifi";
+      };
+      wifi = {
+        mode = "infrastructure";
+        ssid = vars.wifiSsid;
+      };
+      wifi-security = {
+        key-mgmt = "wpa-psk";
+        psk = "$WIFI_PASSWORD";
+      };
+    };
+  };
+}

modules/platforms/baremetal.nix

@@ -0,0 +1,28 @@
+{ ... }:
+
+{
+  imports = [
+    ../hardware-configuration/baremetal.nix
+    ../boot/efi.nix
+    ../disko/baremetal.nix
+    ../services/zfs/enable-service.nix
+  ];
+
+  # Needed for real wifi/bluetooth/GPU firmware blobs and CPU microcode
+  # updates (hardware-configuration/baremetal.nix's amd.updateMicrocode
+  # keys off this) -- irrelevant on the linode/proxmox/lxc platforms,
+  # which are all VMs with no real hardware to load firmware for.
+  hardware.enableRedistributableFirmware = true;
+
+  # AMD GPU: the amdgpu kernel driver autoloads from the PCI ID with no
+  # extra boot.kernelModules entry needed; this is the userspace half --
+  # the dedicated Xorg driver (not just the generic modesetting fallback)
+  # plus Mesa OpenGL/Vulkan (amdgpu/RADV), same firmware blobs as above.
+  # 32-bit support is for compatibility with 32-bit apps/games.
+  services.xserver.videoDrivers = [ "amdgpu" ];
+
+  hardware.graphics = {
+    enable = true;
+    enable32Bit = true;
+  };
+}

scripts/codex-maintenance.sh

@@ -16,6 +16,14 @@
 #
 # --dry-run: adds `nix build --dry-run --no-link` for whatever scope is
 # active (changed-files scope by default, full scope under --full-check).
+#
+# Per-host/per-package eval and dry-run build calls run concurrently (see
+# scripts/lib/nix-parallel.sh) since they're independent of each other.
+# Concurrency defaults to core count capped by available memory (~1GB/job)
+# rather than plain core count, since each concurrent `nix eval` evaluates a
+# whole NixOS system closure and can OOM a small/memory-constrained CI
+# runner otherwise; override via NIX_PARALLEL_JOBS if a runner has more (or
+# less) room than that estimate assumes.
 set -euo pipefail
 
 script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
@@ -23,6 +31,8 @@ script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 source "${script_dir}/lib/nix-bootstrap.sh"
 # shellcheck source=lib/nix-eval.sh
 source "${script_dir}/lib/nix-eval.sh"
+# shellcheck source=lib/nix-parallel.sh
+source "${script_dir}/lib/nix-parallel.sh"
 
 repo_root="$(cd "${script_dir}/.." && pwd)"
 cd "$repo_root"
@@ -246,66 +256,64 @@ echo
 if [[ ${#hosts[@]} -eq 0 ]]; then
   echo "No hosts affected by changed files; skipping host eval."
 else
-  echo "Evaluating host toplevel derivations (${scope_desc})..."
+  echo "Evaluating host toplevel derivations (${scope_desc}, up to ${NIX_PARALLEL_JOBS} at a time)..."
+  # lxc-* hosts deploy via a directly pct-restore-able tarball instead of
+  # nixos-install (see docs/auto-installer.md); proxmox-* hosts can
+  # alternatively be built as a standalone disk image (see
+  # docs/proxmox-images.md). Both are otherwise-unvalidated buildable
+  # surface, easy to silently break without this.
+  declare -a host_eval_jobs=()
   for host in "${hosts[@]}"; do
-    echo "==> $host"
-    nix eval --raw "${NIX_EVAL_FLAGS[@]}" ".#nixosConfigurations.${host}.config.system.build.toplevel.drvPath"
-
-    # lxc-* hosts deploy via a directly pct-restore-able tarball instead of
-    # nixos-install (see docs/auto-installer.md); proxmox-* hosts can
-    # alternatively be built as a standalone disk image (see
-    # docs/proxmox-images.md). Both are otherwise-unvalidated buildable
-    # surface, easy to silently break without this.
+    host_eval_jobs+=("${host}${NIX_PARALLEL_SEP}.#nixosConfigurations.${host}.config.system.build.toplevel.drvPath")
     case "$host" in
       lxc-*)
-        echo "==> $host (tarball)"
-        nix eval --raw "${NIX_EVAL_FLAGS[@]}" ".#nixosConfigurations.${host}.config.system.build.tarball.drvPath"
+        host_eval_jobs+=("${host} (tarball)${NIX_PARALLEL_SEP}.#nixosConfigurations.${host}.config.system.build.tarball.drvPath")
         ;;
       proxmox-*)
-        echo "==> $host (diskoImagesScript)"
-        nix eval --raw "${NIX_EVAL_FLAGS[@]}" ".#nixosConfigurations.${host}.config.system.build.diskoImagesScript.drvPath"
+        host_eval_jobs+=("${host} (diskoImagesScript)${NIX_PARALLEL_SEP}.#nixosConfigurations.${host}.config.system.build.diskoImagesScript.drvPath")
         ;;
     esac
   done
+  run_nix_parallel host_eval_jobs eval --raw "${NIX_EVAL_FLAGS[@]}"
 fi
 
 echo
 if ! $eval_packages; then
   echo "No packages affected by changed files; skipping package eval."
 else
-  echo "Evaluating buildable packages..."
+  echo "Evaluating buildable packages (up to ${NIX_PARALLEL_JOBS} at a time)..."
+  declare -a package_eval_jobs=()
   for pkg in "${all_packages[@]}"; do
-    echo "==> packages.x86_64-linux.${pkg}"
-    nix eval --raw "${NIX_EVAL_FLAGS[@]}" ".#packages.x86_64-linux.${pkg}"
+    package_eval_jobs+=("packages.x86_64-linux.${pkg}${NIX_PARALLEL_SEP}.#packages.x86_64-linux.${pkg}")
   done
+  run_nix_parallel package_eval_jobs eval --raw "${NIX_EVAL_FLAGS[@]}"
 fi
 
 if $dry_run; then
   echo
-  echo "Running dry-run builds for the active scope. This will not create result symlinks."
+  echo "Running dry-run builds for the active scope (up to ${NIX_PARALLEL_JOBS} at a time). This will not create result symlinks."
+  declare -a host_build_jobs=()
   for host in "${hosts[@]:-}"; do
-    echo "==> Dry-run build: $host"
-    nix build --dry-run --no-link "${NIX_EVAL_FLAGS[@]}" ".#nixosConfigurations.${host}.config.system.build.toplevel"
-
+    host_build_jobs+=("Dry-run build: ${host}${NIX_PARALLEL_SEP}.#nixosConfigurations.${host}.config.system.build.toplevel")
     case "$host" in
       lxc-*)
-        echo "==> Dry-run build: $host (tarball)"
-        nix build --dry-run --no-link "${NIX_EVAL_FLAGS[@]}" ".#nixosConfigurations.${host}.config.system.build.tarball"
+        host_build_jobs+=("Dry-run build: ${host} (tarball)${NIX_PARALLEL_SEP}.#nixosConfigurations.${host}.config.system.build.tarball")
         ;;
       proxmox-*)
-        echo "==> Dry-run build: $host (diskoImagesScript)"
-        nix build --dry-run --no-link "${NIX_EVAL_FLAGS[@]}" ".#nixosConfigurations.${host}.config.system.build.diskoImagesScript"
+        host_build_jobs+=("Dry-run build: ${host} (diskoImagesScript)${NIX_PARALLEL_SEP}.#nixosConfigurations.${host}.config.system.build.diskoImagesScript")
         ;;
     esac
   done
+  run_nix_parallel host_build_jobs build --dry-run --no-link "${NIX_EVAL_FLAGS[@]}"
 
   if $eval_packages; then
     echo
     echo "Running dry-run builds for packages."
+    declare -a package_build_jobs=()
     for pkg in "${all_packages[@]}"; do
-      echo "==> Dry-run build: packages.x86_64-linux.${pkg}"
-      nix build --dry-run --no-link "${NIX_EVAL_FLAGS[@]}" ".#packages.x86_64-linux.${pkg}"
+      package_build_jobs+=("Dry-run build: packages.x86_64-linux.${pkg}${NIX_PARALLEL_SEP}.#packages.x86_64-linux.${pkg}")
     done
+    run_nix_parallel package_build_jobs build --dry-run --no-link "${NIX_EVAL_FLAGS[@]}"
   fi
 fi
 

scripts/lib/nix-parallel.sh

@@ -0,0 +1,95 @@
+#!/usr/bin/env bash
+# Shared parallel-nix-invocation helper for scripts/codex-maintenance.sh.
+# Source alongside nix-eval.sh:
+#   source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/lib/nix-parallel.sh"
+#
+# The per-host/per-package `nix eval`/`nix build --dry-run` calls in
+# codex-maintenance.sh are independent of each other, so running them one at
+# a time leaves most cores idle for most of the sweep -- run_nix_parallel
+# fans a batch of them out across up to NIX_PARALLEL_JOBS processes instead.
+
+# NIX_PARALLEL_JOBS: how many `nix` invocations run_nix_parallel runs at
+# once. Defaults to core count capped by available memory (~1GB/job,
+# floor 1) rather than plain `nproc` -- each concurrent `nix eval` here
+# evaluates a whole NixOS system closure from scratch, and on a small/
+# memory-constrained CI runner, `nproc` concurrent evals can OOM-kill each
+# other (confirmed empirically: on a 4GB/6-core box, 5-6 concurrent evals
+# started getting killed while 3-4 ran clean and were still ~2x faster than
+# serial). Override via env if a given machine/CI runner has room to spare
+# or needs a tighter cap.
+default_nix_parallel_jobs() {
+  local cores mem_avail_kb mem_cap
+  cores="$(nproc 2>/dev/null || echo 4)"
+  mem_avail_kb="$(awk '/^MemAvailable:/ {print $2}' /proc/meminfo 2>/dev/null)"
+  if [[ -z "$mem_avail_kb" ]]; then
+    echo "$cores"
+    return
+  fi
+  mem_cap=$((mem_avail_kb / 1024 / 1024))
+  ((mem_cap < 1)) && mem_cap=1
+  ((mem_cap < cores)) && echo "$mem_cap" || echo "$cores"
+}
+NIX_PARALLEL_JOBS="${NIX_PARALLEL_JOBS:-$(default_nix_parallel_jobs)}"
+
+# Separator between a job's label and its flake attr in the arrays
+# run_nix_parallel takes -- a control character so it can't collide with
+# anything a label or attr path would plausibly contain.
+NIX_PARALLEL_SEP=$'\x1f'
+
+# run_nix_parallel <jobs_array_name> <nix subcommand + flags...>
+#
+# jobs_array_name: name of an already-populated bash array whose entries are
+# "<label>${NIX_PARALLEL_SEP}<attr>" pairs, e.g.
+#   jobs=("proxmox-docker${NIX_PARALLEL_SEP}.#nixosConfigurations.proxmox-docker...drvPath")
+# Remaining args are passed to `nix` before the attr, e.g.:
+#   run_nix_parallel jobs eval --raw "${NIX_EVAL_FLAGS[@]}"
+#   run_nix_parallel jobs build --dry-run --no-link "${NIX_EVAL_FLAGS[@]}"
+#
+# Prints "==> <label>" followed by that job's stdout+stderr for every job,
+# in submission order (not completion order) so a run stays readable and
+# diffable across invocations even though the work itself doesn't finish in
+# that order. Returns non-zero if any job failed, only after every job has
+# finished and been printed -- same "surface everything, then fail" contract
+# a `set -e` caller gets, just parallelized instead of stopping at the first
+# failure.
+run_nix_parallel() {
+  local -n jobs_ref="$1"
+  shift
+  local -a nix_args=("$@")
+
+  local n=${#jobs_ref[@]}
+  [[ $n -eq 0 ]] && return 0
+
+  local tmp_dir
+  tmp_dir="$(mktemp -d)"
+
+  local i=0 running=0
+  for job in "${jobs_ref[@]}"; do
+    local attr="${job#*"${NIX_PARALLEL_SEP}"}"
+    printf '%s\n' "${job%%"${NIX_PARALLEL_SEP}"*}" >"${tmp_dir}/${i}.label"
+    (
+      if nix "${nix_args[@]}" "$attr" >"${tmp_dir}/${i}.out" 2>&1; then
+        echo 0 >"${tmp_dir}/${i}.status"
+      else
+        echo 1 >"${tmp_dir}/${i}.status"
+      fi
+    ) &
+    i=$((i + 1))
+    running=$((running + 1))
+    if ((running >= NIX_PARALLEL_JOBS)); then
+      wait -n
+      running=$((running - 1))
+    fi
+  done
+  wait
+
+  local failed=0 j
+  for ((j = 0; j < n; j++)); do
+    echo "==> $(cat "${tmp_dir}/${j}.label")"
+    cat "${tmp_dir}/${j}.out"
+    [[ "$(cat "${tmp_dir}/${j}.status")" -ne 0 ]] && failed=1
+  done
+
+  rm -rf "$tmp_dir"
+  return $failed
+}

secrets/common.yaml

@@ -5,121 +5,130 @@ sops:
     age:
         - enc: |
             -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBQUFhWVFVlVlBnNE5FTnMz
-            VkxkTmxpRXlzZ3pSNTVZWFUrSllsYWo0alRnCkJSc25TYktSTFFJdkQydHcxOUlj
-            ajhQU1ZIb1lodEpHTnVhQjJ6WEthaDQKLS0tIDJCY1E2UVBaU3BoMzhXUXlIdnMv
-            djZTcE1rcWNTOXFPMmFDYTVoRGo4ZTQKYy8g6pqP3VpTKDIBPbnC8NzCdDvOCKnL
-            14kSrKmKlzefTrbkVyriz2Jdl2s0F374yfQQFreZ3m4AffSACCxziQ==
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBIakJkWDQ2TjVIS1Q1UlRJ
+            elVLNmhEVUpMNjROWmN6VC8wTnZzeWhLb0hFCmxmTXp3ZVdQMUhDeGlscThSdFhP
+            eWNZSkFpeEg0cUUxbGFyQWIrTkJkc0EKLS0tIGRBTHdaZ2d5eHhxd3BtWVBLbFlo
+            OVJlYnQ0N09qWFp2TmtXb2E0Wkk2bzQKTxA4rfkF3qlGpDqaZF/J9tgTx1UZ7ZFt
+            W1KevMq/Klnkjb9XDuTEx7zgrjILoViVspe6eGI14myBNYtAP4nLSA==
             -----END AGE ENCRYPTED FILE-----
           recipient: age1njap586hc0q43kr03g6c8eqhdsmk8zcafkl3f83xwlc2gqhlmfgs4tmwad
         - enc: |
             -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBVQnpVWC9wcnIreG9GeE9U
-            UWhuRytkc2Flc0hyQm5yMjZnelNwaXhlWWc4CjBkWnd4cHNRRXQ0UXFkZGp4QlR1
-            eW5NNnE1WFhnb054M1pac2ZidFg4Y3MKLS0tIFdTNmk2V1l2WC9rUk8yd0ZnOEJS
-            VkNnejVGVUZPZkorQkltVEplN2FmdTAKRY7DPP5HeFQntn2f/fXLjU6M1V6iug86
-            BD09PI+T2DbIBQPotRZisw8IzHu9gY/O3+h0TccyIsXjI9wy/XPCAQ==
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBUWXYyUG5UdHdFa2NDZmtt
+            ZG1GSmxVbTg5Qnh4UGxJaitmTmFqK2J1cUV3CmdPSU5GTC9hWkROTkJzMk5Tcmpw
+            ODJzdlIvNkp0ZXdZNlRlUHBkOGVoR1kKLS0tIGsvUWxpU2hkanFNaExJWGozMTJL
+            bndPNkpQNktmQVNKNEhGOEtHSlRBRXMK9rr6NHf3H91GIqTmckjD1eV94FW1vk9G
+            h2KauyebWPyBe8hsCExiPd45ZGqKF0g8pEtWUzonMq9NU/MNVL8YVQ==
             -----END AGE ENCRYPTED FILE-----
           recipient: age19gfn2yedg76dmztm4hncr7vf3r3c9j0qpt4rap7y7gersjk4m3ks2lhd0e
         - enc: |
             -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBkczFSTVhxWHlIWjhRcWlV
-            V2JPQXd5Wnk5R3NwWC81T3Z0MW4vYnd5S1ZZClV1NlU1Tzd6UkxPQ2M4MmhLV01G
-            d3VIb0RhR1RiNTZqNjlQcmg2YjdPeGsKLS0tIDQ1RTFTWGN4MnEvWkRUR3VnN204
-            WVdFOXdmNC9FVFhBSGNEUUgyYWpYYzAKfdpeaFL/RrIbqpD9hNj8L7UxpmiBjE2I
-            go/dR2E1LLXsDPtnSuJb2EZYoFvSsjsIQQQDt+YwRv0fplRtssKdxQ==
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBXdnpGR2ZnaFRSUUNlOUVy
+            ME9pWkFJRTl6ampuZTR0QlQ2TUVEVHV3dkRFCmxML1NSV2dwanRPK3AySDJiUU9P
+            a2VKZ09EaktYU2xvWWpESWtrU3oxalEKLS0tIEt1aWxuNmlaV3l1OGNqS2RtMmhm
+            Rk9SUEpBaXY0RG9uMk53ejdJdVZ4NDQKfn4paPsHrfU3Ki2AgPBB8aLBbmD2yh1O
+            9rDxv/6xSsDXNTquP11smPOKsRG7mDMDHVByn6GieZrpSxUf9vu3Iw==
             -----END AGE ENCRYPTED FILE-----
           recipient: age1ll6hj5ggruetgjwjfnplpn5xtq35uhlcdflksx3xmnjm6s3uad9sz70jkf
         - enc: |
             -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSB6TjhmOTJ0bUpMQWowb0hB
-            T3Era1loU1pMdmkxdnAvRkViekpqZWZjaWgwCkFRQXhFUy9PRVBma2JMUDhqY2F1
-            VVFDRFNVbWpNaEczY1JVQUMyck9XdEkKLS0tIGpxc0tGdVFKK3FteVJKM1Fxa2ky
-            a21WLy9qV05hUURCTVBvcVh3cE45Z3cKXCYfXSjhApBoLbHDu2OOd57Y1zN54yy+
-            WDQvz8PpMxhc1nU5Kw/cI+WmL1KvN0qQZfOx/7D4W+dy/ZDWX27TpA==
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSArNHZpMDV5a2JCN1NxY2hF
+            MWxtNUNVQXp6K3lWYndTRU85Wjh4YlN3UFFrCnNZbHA2Z2RUSmxITm4yeU9rYnV0
+            TTFkZUczcTZLU2pJRDQ3TVl5ZGErWDgKLS0tIDJGbzZZNjQ2RXUzRmUwKzdiUHlK
+            TEU5VERpZ1p3bU1KcnEvRDRCSVNqT2MKQPfu0lskXaEAYgecmN1a0kPHF+fGEm7R
+            wiY7TFNLeXM5aJqEnKARtOotJDetI+9VNssTT21X/Qaik6fqgM+b1A==
             -----END AGE ENCRYPTED FILE-----
           recipient: age120le4a5l8dh3lyfgvmj3d9ksmej6ajs5mer5y7r0vfg3x9fn69dqf8xgzu
         - enc: |
             -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBZK0FYQnBHMHZ6dlpMYTlC
-            WFdOWDFkRVBuY1pmdTFiUndLV3JXcndZa3pNCnJsd0tHN0FveWV6UUNQSEdpdWw5
-            dWZITkxWelNIRlpKS1pnN0ZmVlQvZjAKLS0tIEUwMXdtNFdkUWdIRjlxc0owdTRr
-            c1o1TmptWWd1ZGxzcWJJNzJ0K25PTTAKoos5rnkyQBCm+ZuhCCaMJwqJBo1fpnsl
-            G74wu5vbTBG4VjVhI5KqyiuiTRU4jPcGxysECqe7AyZUBGp7ndewgw==
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBOUlp5MmcvSFRnaVdWZ1g0
+            NmwvS3pGa1JCd0RuQnFMeU5wZDZYK0NQR1FJClF0Z0VENThtTzZ1OUtmUjdDenV4
+            Mko0T2o4UzVubVRCdUlCMERyV2w5WmcKLS0tIGZUallPeUhXUGtVMmNIWWRkaFVT
+            TVNVTjhiQzJkdlVQN3p1bnR1aUYyQmcKVnqbCuaSYEA7stk1MyfCzRbqt7EL+E5/
+            jgxraiFmaZqjDI5mxG/e7eFdXfv53AtKzZm92TlzvV+4bfidj5SvYw==
             -----END AGE ENCRYPTED FILE-----
           recipient: age1jy444f9d9stygj4p3w9kh54cqcfr654tvr75tdvee5cxsgtdtc9q3v60ep
         - enc: |
             -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBTVkVXaCtGTXVkRXRZMFZ1
-            ZUdXM1hRcDhaSURqcGh2eksxTUNCckk5SVJjCnhkSDRKdDFSckxUWXd4SmVxWG5p
-            bU5OV0hzaWR6VDFwcDY2WlY4WnN3cFEKLS0tIElOVzRCcXR4U0dhajJySUhaZGps
-            MW9rQk1JVDFWRnFxVzhCUkRIS09EamsK1rVidD48PqwlEWQyjF7iQWU7aBdPqQHy
-            z5LaSi3LvJX3rNE/+q0E8/gbZyjGpbEn3AUI5mBF64GY3IZkRxZSXQ==
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBCWTdCWHhTamI1VHpvUzZ3
+            M2VnV3NFZTcrc2Jzazc0V3NsMDQ4RmtYZ0ZrCmVhV0pweTVLdzBLRnlJZURwNXVT
+            YzN1aHZyTmRqc0dtYjJWekRaODZoR3MKLS0tIHZPV2ppSTVwb2VHWStRY0pKSTZ5
+            MXVFSE1odzRMeW9LQjVQUytBTWhHUDAK+UUowhIQ3w5O4Y/m9Pq41X2l0DZQfzOT
+            itFkXJRnvUmkCxWYRDFJjQ6FpHHaNDqs0BlQZ5QZ+chzcKuUAG+uEg==
             -----END AGE ENCRYPTED FILE-----
           recipient: age120whqj96g26lsgy4udvgsn8dc9lumh8jeu3a564fx79rjr5lxffqmrljuu
         - enc: |
             -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSAvbnJCWU9UMXJXMG92b3hm
-            WWNBTFpQamVWQThITmt5QUVwR3h2OHI2SlVRCjcxOEJTVkFjN0NhamFZQ1plK29w
-            dk5XYkYxOXQ0YkVzcVc3VnhCQWlsV0UKLS0tIHZ5cWtFZUhDKzZkOE1BK2Y5TStR
-            SFlDRjE4ZHpiVEJOQk5TUGNEN1B4amMKUCJ8CL8QpmRpFs83HD9TUn7NrPguuP8S
-            JQH/bzPorXTXJuyOKuKAZq1hK8BmiMUFksaZ03yN6YaFVIOeelEEMg==
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSB2MEZxZTI3Y0xWSDdzanRC
+            RytNV2x0UkY0SnRzVnR0eFNvaDRJeUtpZjBjCko2T09qSTJsQm51aW9pR3JUbkRm
+            NWRXODg0L08xdGNLdCtORXA1VWRteTAKLS0tIC90bkZEd2pOYWFCeGg3UW54TWxH
+            Y1liQWVWS0t4WXBROENGNnpDVUpxRVUK57qCQ0l5Gw1ZqM50XSBNwVlXkue3QOT/
+            BPmPFkMNpVIcUDENj+mJAS5GHuEm1MkZcMi/wN9Hp2KE05ZywPR2Zg==
             -----END AGE ENCRYPTED FILE-----
           recipient: age1xjst4frdh0th6q8m7p7u9g5af7ty5jqeum0p6z8a52a9q7st7ewqw8yl9j
         - enc: |
             -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBxWHV0S2dxeHZEMDNRSkhO
-            ZFJHaiszd0tzYzlzd3gvbXNSQmlMVlJUNGcwCnVrM29MdFZCR1NBYnpkQ1k5VFZQ
-            b3Z2Q3ZGekVQZkZKWGlka3NDOHJ0R1EKLS0tIDlXTmNzUk0wVXo0UWhkd0ZvK3FI
-            UzJxU3RkdWs4aTZYVVkrS056bTN1ek0KgKJNz8GvynX5pK33aW9x3v6yr2Ox0LCT
-            GGrt+ddbKLcwpBpYjfWkFhffO330EKui73S+c/qMf8N9j6wzalOTpQ==
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBCaGhvbE9EU1dMZitXYlZk
+            NVBEYWxHbzAwQ1FUU2JidjJPZDZLVDZLODI4CjYxaG9OSlVOeGQ5SmlGNWEzNG1n
+            WU9PRVpVRk9rd1BvWDNnMFcrZFNJZDAKLS0tIEUzV0E3OGE5cWM4MjBwTk9Mb3Np
+            cDJQZGNqNXlySjRLcWF4R0V0ZS9DVFEKS0CmXOfJ1qpUF24EJT6F5/6xzR7h593O
+            mLiMdOCeFYWlTtBwrD1dkweAzStiHlzTVEq3w9BFvAsr5x/NbQJUJA==
             -----END AGE ENCRYPTED FILE-----
           recipient: age10at8862478urh0eeuwh8hzln6ck78jgwtztgxatwqlzwagg77y5snm4xzg
         - enc: |
             -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSA3ZWJlbDl1TEkvWEpBMC9Y
-            ejY1MnFMUExBeDhITndxNy9YUi9hU0tXM1JJCjcwNEppcDdxYzlCSVMrMExWa3A4
-            cmFPSjV3LzkyMXZCUDU2QmtHRmpHRmsKLS0tIFFTdXBOaDJJTERseXlGbmdrQzhD
-            TWtnRFdIRXpsNkY0U1BiczNsdUk1V1kKGpndKmT8kj/oIxQuxQALfzscw+CsVmnj
-            cyPC3bF+tG6LcqqoKLjPSJfcIgzhnX7cAr/wwESavemLn8L/zQMe4w==
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSAzOUxYa2xOYlVYd1lWclR1
+            bDJFTEg1SjBhNjhFT0IwY0ZxZFRFTzRUVlhZCmpwL1VBMElZNzV3UkFCV0FWb3Jr
+            SlN2dTNmOFRXeGJVTFgwdjA4SmdSQXMKLS0tIHZOdjFzalRkL2N5eU1iSDkzbHYw
+            NEU3VWxBNE9NZy9hVFJwM0VnQ2RIbjQKc62J04UtVjqiU7p7GueMicdCDRTvM9zY
+            IPOJSwTCatRMWeuBJIsRNkbyOLeSAesQdfAXL5GoAE8mBtBdhJKaLA==
             -----END AGE ENCRYPTED FILE-----
           recipient: age1ezk9x53zt8kcnscdm80jcyf0xq97vndv7jsn3rl8cc0cwm2jmpmq372dzs
         - enc: |
             -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBpQVVyY3UrSHFWSmpDdmRE
-            dlh5akFqVFdDVFNMSHE1eVJnZzR6YzFHSVFRCko4UE9EdXNxZzF2MW5PTTN6dEdU
-            ZHM1MGowcVB2Y1ZlOTVHdnNtY3diM2cKLS0tIDBYSmh5dVVPaTM3d0ErcC8wMDNB
-            eUpHWnZlYnJsbHZuS3pwbG15UGtwN2MKVPQA1MpjIfYAsNacoAbpvZNuAIkvx7ER
-            CvWBKEHUVm6m8905BXzv8MdGTAk0EyCIP3aMmYqTIYfv2k9pP0T08A==
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSB1NkppWjNXRDlsVXZ6b1ND
+            OExFRXVOcXVSWmZXemNoK09EcXBHZ0JMYnd3CjlsaEM4MjdJT1lBZGFCZTNISHZV
+            MjBRTUlTVkZBQitFc1I3ekRLN0RtYzQKLS0tIC9oelk1TTRzeFNpbWQzL0pObXJq
+            eWxHbkF3anVPRFgyQ0kvSlJqQTdLQW8KLfZ+UIzas43ROGO51KKOmy58R2tl3jwh
+            M+1WXB8vIXA7DLQ6vMbzMPMhBnJ4kbZgRtxELg7fzSLQStLvkY+O9A==
             -----END AGE ENCRYPTED FILE-----
           recipient: age1fxxzpnfse8nd9wz78ht3m0plrmraacf4cpga0pe8fm2tdnqcgy8q7qsyvp
         - enc: |
             -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSA0MTQ4MzN0bDJNL1l1bmpX
-            ekxDUXRNa0JHWWltZFNGTVltTFdSSE82SVZvCmdUWUdja3JIajMzY09IMUE5elox
-            MDdEakFJTmtkRWF2R1BGNkQ4U3grNWsKLS0tIE9hZUhkVGI1ZEpzdDhRU21EZm91
-            VnJNb1kyQ05MM0RJa1lLUEtjWWxkSTAKHVAKcGcWl6LncJALRBU9RKP7ot6C6GSE
-            1iZtj1SNX6wzEWrhOEnV37aQ8bKZj6u+Y/q6/vJ4qiBs78y/drdIzA==
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBWVm5uZU43cFFLcC8wVkZO
+            NmlOMmlocGpwbXFkUFlCMEl5Tkx1QWJIdVRjCnFBTzdWT3NaM0N2eGlCbDV2NUU3
+            Z3FnYktsZ3NHT3Y0b2hOd0xmRjlLMjgKLS0tIFBQVXVDeHkyeVNNek5CSldSMFlY
+            a0Q5bHVlRHUxMWduMCtLRjdnMUw5RG8KDJX8I21+bUpkJ5wnX+kGhsSa8mKqsR25
+            iNdOtVtb2WRxIAgyjR72yp1tLMrop9NkZN68MGvd/LsNM+6simyosQ==
             -----END AGE ENCRYPTED FILE-----
           recipient: age190htw7prp4vln076dxjx3gxxaq06h0zl0te7cqgpx79vl3lhkaes8suy05
         - enc: |
             -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBNUEVWY2NpVEU4OTZPZTZR
-            UzdKcktpUGJOcnJ0aEhkQlhvUWdUYkV2SkdzCm51eGJVeHJMcVRRRld0dFRCYUxr
-            TTN2WEhOVjRqV0FtQXowZWNTbkJneEUKLS0tIFpUazZpTUNWZUZBSFE0VDZZbkJu
-            SFVlUVhySnNqUENYOG9qUm5ZMDc1ZW8Kv0lY5dhnCEheM0sttfr4p7IL+EVog16T
-            OapUdbuXL2l7t7URzHnvfG/nbOtJIjH8a0XFsWyJChtNXpF2d/vf2g==
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBHcmIxZVc4aGRmNEhSY3Iv
+            YXhzLzduWFdzVVlKZTR6WExzcDNtSWQza0FjCmlsZDVJUWpqY0pRSktQeGk2SlAy
+            cjZXL0JCVFRtQXpHNkNIejhyTnVtWjgKLS0tIHBSZ1JyMFBJVWZ3VWFLOUt5OHd6
+            YUI4ODhHc1I2UHVRQ0diSnhsSUhDelEK3hBBX1+Uwe/MusLqmt4oAy7Z6jOU96Cd
+            7zTe8YyLc0/DUDsyuFZ7a68riO9/My+zrFllwtKe/JPmPHLY0+3Pnw==
             -----END AGE ENCRYPTED FILE-----
           recipient: age1ukpqxzl44mnjpy5r96sfuc5sqzm47u4k8ujjh5qdgy6jvl9uqgpspymqfk
         - enc: |
             -----BEGIN AGE ENCRYPTED FILE-----
-            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBvTzc2aExGTHFrc0ZtL3pq
-            YlZLbzd3MVZHZTB0VUQvSXZ4NGVsZk42c2hBCk1vbTk0Tnl3b01vbVZaMkJ5aldE
-            WmZBMGFjb2pjQXpYcnBxWmp0UUsrdXcKLS0tIG16SG9JbFdkbmVidCsxUnpBR3V3
-            RzNOY3hIRWk4UXh6N3NrcjNSU3ZwWTgKaExY4U2s8E6ojljJ+4TU+YJhcLXyuVA1
-            ROB70jQCjFvQOeo6thjQohSSUoPKhxSl1/nr4ZiGBO3/VskzihckKg==
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBZSE53Yy9FOHNpeVFtTmF1
+            UUExbzJlZktxMGR3Ukora3RpbVN2THlyVjNJCnFpWVEyK2U1N1diOWZQWm5Bb1lD
+            djV0U3QxamRJY3BRN3hBTmZ4SVRiV0UKLS0tIFU2Q0o1UTRjaEFaSTRVTm5MVW5T
+            QXdEbVB0Y3YwM3R5dGp5d1oxeUxHNGcKRj5hNLlXtZoT3IwXHTxaReJLu8k133n/
+            ZoCtv470LPL1M/kTjdPc/nWMgYOHDKkO90gr3WILfHg8idkVuCLT2Q==
             -----END AGE ENCRYPTED FILE-----
           recipient: age15kh7akxlx7zn00tey79rq2g8lgs4j5y77rcnyfxrxap8ckfu0a9sqvtdhh
+        - enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBQazFqSWpaVGtkNFhPU3A5
+            cE1oVXEvSU5RNnY5NU9mbFhGOFQycVFuL1U4CnNwRnVkYmxCNFZzNVZvM2N5eVN0
+            clNjUWY4RHZxbVNsMFlFSnZKcmI3dm8KLS0tIFBDZTRuRlprdzdVT1ZHejNsNDBJ
+            OUVjclpPSjl0RGtLVlZRSkpFeG02KzAKt0rcJunZppojjijrjbXsztLwRD9pgWRb
+            jYsn7dCvWGFZGVgeyxqfL0jfYNz6dW0yecRE/gbP5hIooxbcPcxfag==
+            -----END AGE ENCRYPTED FILE-----
+          recipient: age1ehkswwz2pqaz4svzh7ela5tdnssl8kn6d4vwwxd6zwg8exfpd43syyrrjp
     lastmodified: "2026-07-19T02:30:40Z"
     mac: ENC[AES256_GCM,data:UiL3VMDF6rq4Nr87KspcDx434q3tfNXeb5pwH2O+4ssNQ6xzcYDdzXBnhAY3zLBsqPMKrvHBd4Ot/gEMcq3FMIVe7Q6p9yWKpep66KZ/yWEhAlwIVhD79Oj8VS+1CHKjf25zpRdhZorp04oeFQQd9VfjJB4EE/Q1aVbwTGlpIic=,iv:i/0conaFgFia+wzNTdUL6tlSTw35HTK3Ap1Sr5RGHf8=,tag:ULbz5FllShA/JjlSRdxA0g==,type:str]
     unencrypted_suffix: _unencrypted

secrets/gui.yaml

@@ -0,0 +1,34 @@
+wifi-password: ENC[AES256_GCM,data:SZQPtU6PYHbf9o83wq3KTupx,iv:FxO68Pn/+N58r/OPLfkAMYPFpP8TYxszMniFd/01E38=,tag:jwxaY6zDEcO5r9OWSfvUyw==,type:str]
+sops:
+    age:
+        - enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBrWFpRSURBR0gvRzVIMElk
+            ZlJGZlJvc3lFOVJIZ29YbFp3akFCNG42TWkwCjhNM0J6cjIwRXBzc3VWNVpZSGdL
+            Q1M1bm90OE1tTG9GbUxvS1dvRkZ0UGsKLS0tIE43L1dnbWhQOUhhYjg5bEIvZkVD
+            Zkh1NDhvZjlDc2c0cUZUYVRLdEozS2sKU/r6JnEnUs2WPj/J724B+lgiV84iteZa
+            uMlhgnwYJFLkH7ZyydQqjYcHL7xEInr0taYJN+M0nZIsZTvzAEi7iw==
+            -----END AGE ENCRYPTED FILE-----
+          recipient: age1njap586hc0q43kr03g6c8eqhdsmk8zcafkl3f83xwlc2gqhlmfgs4tmwad
+        - enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBXZmYrVTZxWW1QKzhLWThX
+            UFAwSEhId24yMitmVk1kT215OGdqbGp4akFjCjRzN2dkTURXS0wzbzhYL0YxRW41
+            TWJ3UExXaHNhSUxaYkVsMFNCekZHZDgKLS0tIGQrSWNzalhCbGJZdkxvT1N5ZWlo
+            a0l0Nk9DY1BKYU9ReWovaHJ0Z2NyWGcKFoIYS1M4EbR6H6QG3Wjv2ZdX3r2W8zKp
+            S9f578O5ZLh2OWaawcSb0oecZJykT9pgudVcuKRunzZN7NQvFxBRnQ==
+            -----END AGE ENCRYPTED FILE-----
+          recipient: age190htw7prp4vln076dxjx3gxxaq06h0zl0te7cqgpx79vl3lhkaes8suy05
+        - enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBlWnpPUk10YW82TVRzbk80
+            WHJqbXVVSUFrSTVjMEdqUTdSQWwvdG1TcW1nClQ5T0E0akFtSlFGdC9WaU1LbGkw
+            allOSjJ2SjQ0MkVMcVNtdzN3cW1hVzgKLS0tIERlQ2l3NitPQndERTYrNVA3ajF0
+            bCtnYzhHcnZkalRNK1BHbjdIS2JLNmcK5RwFzeaK1KafO4cAtdFh5Tnz1lpZbj1Q
+            aeMmTGMkxJYVGzXKS6SRspVT3MvY4Fvay8B0MezjG5Y5HKNIv22Vog==
+            -----END AGE ENCRYPTED FILE-----
+          recipient: age1ehkswwz2pqaz4svzh7ela5tdnssl8kn6d4vwwxd6zwg8exfpd43syyrrjp
+    lastmodified: "2026-07-22T01:15:21Z"
+    mac: ENC[AES256_GCM,data:dC/oIqMUHkOh3AocOwP7Gc6XGH3L+nTqJfhFNts1DNbRXsopNIxVBtIz2pEhwnWSQrqPisDLmPHFBwRpGVn01u8w8IU1FKbAKC0J2nJXF8ozpInbjzDOmehqPWZG7yaKoq8cwAnp5XOk+IVO4l6tPxLxkExU5fT2ALuMq+sgOko=,iv:jaVyArpf6zMCFa6J9X1aQMGrmFq+W2CPZdWO6vVW68c=,tag:S+qF8/FkgHc4uW0e4ICmSQ==,type:str]
+    unencrypted_suffix: _unencrypted
+    version: 3.13.2

variables.nix

@@ -45,6 +45,12 @@
   # the installer image's nixos/root users.
   adminSshKey = "ssh-rsa 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 wayne@stream";
 
+  # Prestaged wifi credentials for the gui host's NetworkManager profile
+  # (modules/networking/wifi.nix). Leave blank until the bare-metal
+  # hardware profile is wired up — an empty ssid disables the profile
+  # rather than creating a broken empty one.
+  wifiSsid = "nbn-fttp-net-5G";
+
   # System
   timeZone = "Australia/Brisbane";