Fix nix flake check warnings and errors

- Move nextcloud-talk-desktop to x86_64-linux-only block (fixes aarch64 eval error)
- Remove duplicate deps from plasma-bigscreen (auto-injected by mkKdeDerivation)
- Replace nixfmt-rfc-style with nixfmt (deprecated alias)
- Set programs.git.signing.format = null (adopt new default)
- Add meta.description to all flake apps

flake.nix

@@ -270,7 +270,6 @@
           "custom-mcrcon-rbw" = pkgs.custom.mcrcon-rbw;
           "custom-tea-rbw" = pkgs.custom.tea-rbw;
           "custom-rclone-torbox-setup" = pkgs.custom.rclone-torbox-setup;
-          "custom-nextcloud-talk-desktop" = pkgs.custom.nextcloud-talk-desktop;
           "custom-opencode" = pkgs.custom.opencode;
           "qt-pinned-jellyfin-media-player" = pkgsQt.jellyfin-media-player;
           "qt-pinned-stremio" = pkgsQt.stremio;
@@ -278,6 +277,7 @@
         // (
           if system == "x86_64-linux" then
             {
+              "custom-nextcloud-talk-desktop" = pkgs.custom.nextcloud-talk-desktop;
               # nix-deck kernel from Jovian-NixOS (Steam Deck) - expensive to build
               "nix-deck-kernel" = self.nixosConfigurations.nix-deck.config.boot.kernelPackages.kernel;
             }
@@ -341,30 +341,37 @@
           update-doomemacs = {
             type = "app";
             program = "${update-doomemacs}/bin/update-doomemacs";
+            meta.description = "Update Doom Emacs configuration";
           };
           update-claude-code = {
             type = "app";
             program = "${update-claude-code}/bin/update-claude-code";
+            meta.description = "Update Claude Code package version";
           };
           update-opencode = {
             type = "app";
             program = "${update-opencode}/bin/update-opencode";
+            meta.description = "Update OpenCode package version";
           };
           rotate-wallpaper = {
             type = "app";
             program = "${rotate-wallpaper}/bin/rotate-wallpaper";
+            meta.description = "Rotate desktop wallpaper";
           };
           upgrade = {
             type = "app";
             program = "${upgrade}/bin/upgrade";
+            meta.description = "Upgrade NixOS configuration";
           };
           bootstrap = {
             type = "app";
             program = "${bootstrap}/bin/bootstrap";
+            meta.description = "Bootstrap a new NixOS machine";
           };
           build-liveusb = {
             type = "app";
             program = "${build-liveusb}/bin/build-liveusb";
+            meta.description = "Build a bootable Live USB ISO";
           };
         }
       );

home/roles/base/default.nix

@@ -60,6 +60,7 @@ in
 
     programs.git = {
       enable = true;
+      signing.format = null;
       settings = {
         user.name = "John Ogle";
         user.email = "john@ogle.fyi";

home/roles/emacs/default.nix

@@ -1,4 +1,9 @@
-{ config, lib, pkgs, ... }:
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
 
 with lib;
 
@@ -20,9 +25,10 @@ let
 
   # Default emacs configuration with vterm support
   defaultEmacsPackage =
-    if pkgs.stdenv.isDarwin
+    if pkgs.stdenv.isDarwin then
-    then pkgs.emacs-macport.pkgs.withPackages emacsPackages
+      pkgs.emacs-macport.pkgs.withPackages emacsPackages
-    else pkgs.emacs.pkgs.withPackages emacsPackages;
+    else
+      pkgs.emacs.pkgs.withPackages emacsPackages;
 
   # Path to doom config directory (relative to this file)
   doomConfigDir = ./doom;
@@ -56,8 +62,8 @@ in
         pkgs.nerd-fonts.fira-code
         pkgs.nerd-fonts.droid-sans-mono
         pkgs.nil # nix lsp language server
-        pkgs.nixfmt-rfc-style
+        pkgs.nixfmt
-        (pkgs.ripgrep.override {withPCRE2 = true;})
+        (pkgs.ripgrep.override { withPCRE2 = true; })
         pkgs.pipenv
         pkgs.poetry
         pkgs.python3
@@ -88,7 +94,7 @@ in
       };
 
       # TODO: Use mkOutOfStoreSymlink instead?
-      home.activation.doomConfig = lib.hm.dag.entryAfter ["writeBoundary"] ''
+      home.activation.doomConfig = lib.hm.dag.entryAfter [ "writeBoundary" ] ''
         # Always remove and recreate the symlink to ensure it points to the source directory
         rm -rf "${config.xdg.configHome}/doom"
         ln -sf "${config.home.homeDirectory}/nixos-configs/home/roles/emacs/doom" "${config.xdg.configHome}/doom"

roles/plasma-bigscreen/package.nix

@@ -62,33 +62,22 @@ mkKdeDerivation {
   ];
 
   extraBuildInputs = [
-    # KDE Frameworks
+    # KDE Frameworks (auto-injected by mkKdeDerivation: ki18n, kcmutils,
-    ki18n
+    # knotifications, kio, kwayland, kwindowsystem, ksvg, kiconthemes)
     kdeclarative
-    kcmutils
-    knotifications
-    kio
-    kwayland
-    kwindowsystem
-    ksvg
-    kiconthemes
     kglobalaccel
     kdbusaddons
-    # Plasma
+    # Plasma (auto-injected: plasma-workspace, plasma-activities,
-    plasma-workspace
+    # plasma-activities-stats, libkscreen)
     plasma-nano
     plasma-nm
-    plasma-activities
-    plasma-activities-stats
     milou
-    libkscreen
     kdeconnect-kde
     # Qt — qtdeclarative is needed for Qt6::QmlPrivate (see postPatch)
     qtdeclarative
     qtmultimedia
     qtwebengine
-    # Other
+    # Other (auto-injected: bluez-qt)
-    bluez-qt
     qcoro
     plasma-wayland-protocols
     wayland
@@ -96,22 +85,22 @@ mkKdeDerivation {
   ];
 
   postPatch = ''
-    substituteInPlace bin/plasma-bigscreen-wayland.in \
+        substituteInPlace bin/plasma-bigscreen-wayland.in \
-      --replace @KDE_INSTALL_FULL_LIBEXECDIR@ "${plasma-workspace}/libexec"
+          --replace @KDE_INSTALL_FULL_LIBEXECDIR@ "${plasma-workspace}/libexec"
 
-    # WORKAROUND: Plasma version numbers must match; we're building an
+        # WORKAROUND: Plasma version numbers must match; we're building an
-    # unreleased package against a stable Plasma release. Remove once
+        # unreleased package against a stable Plasma release. Remove once
-    # bigscreen is part of the Plasma release cycle.
+        # bigscreen is part of the Plasma release cycle.
-    substituteInPlace CMakeLists.txt \
+        substituteInPlace CMakeLists.txt \
-      --replace-fail 'set(PROJECT_VERSION "6.5.80")' 'set(PROJECT_VERSION "${plasma-workspace.version}")'
+          --replace-fail 'set(PROJECT_VERSION "6.5.80")' 'set(PROJECT_VERSION "${plasma-workspace.version}")'
 
-    # WORKAROUND: QCoro6Qml's cmake config links against Qt6::QmlPrivate but
+        # WORKAROUND: QCoro6Qml's cmake config links against Qt6::QmlPrivate but
-    # doesn't call find_package to import the target. This is arguably a QCoro
+        # doesn't call find_package to import the target. This is arguably a QCoro
-    # packaging bug in nixpkgs (it should propagate qtdeclarative). Remove
+        # packaging bug in nixpkgs (it should propagate qtdeclarative). Remove
-    # once QCoro or the nixpkgs plasma-bigscreen package is fixed upstream.
+        # once QCoro or the nixpkgs plasma-bigscreen package is fixed upstream.
-    substituteInPlace CMakeLists.txt \
+        substituteInPlace CMakeLists.txt \
-      --replace-fail 'find_package(QCoro6' 'find_package(Qt6 ''${QT_MIN_VERSION} CONFIG REQUIRED COMPONENTS QmlPrivate)
+          --replace-fail 'find_package(QCoro6' 'find_package(Qt6 ''${QT_MIN_VERSION} CONFIG REQUIRED COMPONENTS QmlPrivate)
-find_package(QCoro6'
+    find_package(QCoro6'
   '';
 
   preFixup = ''