fix: resolve evaluation purity, missing packages, and brittle paths

core/home/behavior.nix

@@ -16,10 +16,6 @@
 
 let
   configDir = ./config;
-  overridesDir = "${config.home.homeDirectory}/.config/nomarchy/overrides";
-
-  # Check if user has an override for a specific config
-  hasOverride = path: builtins.pathExists "${overridesDir}/${path}";
 
   # Behavior config categories with their source paths
   behaviorConfigs = {

core/home/configs.nix

@@ -37,13 +37,11 @@ let
 
   # Check for user overrides
   userConfigDir = config.nomarchy.configOverrides;
-  hasUserOverrides = userConfigDir != null && builtins.pathExists userConfigDir;
 
   # Generate the xdg.configFile attribute set
   makeMapping = name: type:
     let
-      hasUserOverride = hasUserOverrides && builtins.pathExists "${userConfigDir}/${name}";
-      source = if hasUserOverride then "${userConfigDir}/${name}" else "${configDir}/${name}";
+      source = if userConfigDir != null then "${userConfigDir}/${name}" else "${configDir}/${name}";
     in {
       inherit name;
       value = lib.mkDefault {

core/home/overrides.nix

@@ -20,14 +20,9 @@
 let
   overridesDir = "${config.home.homeDirectory}/.config/nomarchy/overrides";
 
-  # Check if a specific override exists
-  hasOverride = path: builtins.pathExists "${overridesDir}/${path}";
-
-  # Get override source if it exists, otherwise use default
+  # Helper to get override from options
   getOverrideOrDefault = { path, default }:
-    if hasOverride path
-    then "${overridesDir}/${path}"
-    else default;
+    config.nomarchy.overrides.paths.${path} or default;
 
 in
 {

core/system/hardware.nix

@@ -25,7 +25,7 @@ in
         wantedBy = [ "multi-user.target" ];
         serviceConfig = {
           Type = "simple";
-          ExecStart = "${config.users.users.${config.services.displayManager.autoLogin.user}.home}/.nix-profile/bin/nomarchy-haptic-touchpad";
+          ExecStart = "${pkgs.nomarchy-system-scripts}/bin/nomarchy-haptic-touchpad";
           Restart = "on-failure";
           RestartSec = "2";
         };

core/system/scripts-derivation.nix

@@ -0,0 +1,60 @@
+{ pkgs, lib, ... }:
+
+let
+  # System script dependencies
+  systemScriptDeps = with pkgs; [
+    coreutils
+    gnused
+    gnugrep
+    findutils
+    gawk
+    jq
+    nixos-rebuild
+    pkgs.home-manager
+    git
+    sudo
+    brightnessctl
+    playerctl
+    pamixer
+    pciutils
+    usbutils
+    networkmanager
+    lshw
+    parted
+    btrfs-progs
+    cryptsetup
+    gum
+    curl
+    wget
+    libnotify
+    bc
+    supergfxctl
+    systemd
+  ];
+in
+pkgs.stdenv.mkDerivation {
+  pname = "nomarchy-system-scripts";
+  version = "1.0.0";
+  src = ./scripts;
+
+  nativeBuildInputs = [ pkgs.makeWrapper ];
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp * $out/bin/
+
+    chmod +x $out/bin/*
+    patchShebangs $out/bin
+  '';
+
+  postFixup = ''
+    deps="${lib.makeBinPath systemScriptDeps}"
+    for file in $out/bin/*; do
+      if [ -f "$file" ]; then
+        wrapProgram "$file" \
+          --prefix PATH : "$deps" \
+          --set NOMARCHY_PATH "/etc/nixos/nomarchy"
+      fi
+    done
+  '';
+}

core/system/scripts.nix

@@ -1,64 +1,5 @@
-{ config, pkgs, lib, ... }:
+{ pkgs, ... }:
 
-let
-  # System script dependencies
-  systemScriptDeps = with pkgs; [
-    coreutils
-    gnused
-    gnugrep
-    findutils
-    gawk
-    jq
-    nixos-rebuild
-    pkgs.home-manager
-    git
-    sudo
-    brightnessctl
-    playerctl
-    pamixer
-    pciutils
-    usbutils
-    networkmanager
-    lshw
-    parted
-    btrfs-progs
-    cryptsetup
-    gum
-    curl
-    wget
-    libnotify
-    bc
-    supergfxctl
-    systemd
-  ];
-
-  nomarchy-system-scripts = pkgs.stdenv.mkDerivation {
-    pname = "nomarchy-system-scripts";
-    version = "1.0.0";
-    src = ./scripts;
-
-    nativeBuildInputs = [ pkgs.makeWrapper ];
-
-    installPhase = ''
-      mkdir -p $out/bin
-      cp * $out/bin/
-
-      chmod +x $out/bin/*
-      patchShebangs $out/bin
-    '';
-
-    postFixup = ''
-      deps="${lib.makeBinPath systemScriptDeps}"
-      for file in $out/bin/*; do
-        if [ -f "$file" ]; then
-          wrapProgram "$file" \
-            --prefix PATH : "$deps" \
-            --set NOMARCHY_PATH "/etc/nixos/nomarchy"
-        fi
-      done
-    '';
-  };
-in
 {
-  environment.systemPackages = [ nomarchy-system-scripts ];
+  environment.systemPackages = [ pkgs.nomarchy-system-scripts ];
 }