diff --git a/README.md b/README.md
index b9f3662..eb110c8 100644
--- a/README.md
+++ b/README.md
@@ -135,7 +135,7 @@ more than issue reports, as supporting hardware _needs_ hardware.
 
 Superfreq uses TOML configuration files. Default locations:
 
-- `/etc/superfreq/config.toml`
+- `/etc/xdg/superfreq/config.toml`
 - `/etc/superfreq.toml`
 
 You can also specify a custom path by setting the `SUPERFREQ_CONFIG` environment
diff --git a/nix/module.nix b/nix/module.nix
index 5014f21..76d298f 100644
--- a/nix/module.nix
+++ b/nix/module.nix
@@ -5,18 +5,21 @@ inputs: {
   ...
 }: let
   inherit (lib.modules) mkIf;
-  inherit (lib.options) mkOption mkEnableOption;
+  inherit (lib.options) mkOption mkEnableOption mkPackageOption;
   inherit (lib.types) submodule;
+  inherit (lib.lists) optional;
   inherit (lib.meta) getExe;
 
-  cfg = config.programs.superfreq;
-
-  defaultPackage = inputs.self.packages.${pkgs.stdenv.system}.default;
+  cfg = config.services.superfreq;
 
   format = pkgs.formats.toml {};
+  cfgFile = format.generate "superfreq-config.toml" cfg.settings;
 in {
-  options.programs.superfreq = {
+  options.services.superfreq = {
     enable = mkEnableOption "Automatic CPU speed & power optimizer for Linux";
+    package = mkPackageOption inputs.self.packages.${pkgs.stdenv.system} "superfreq" {
+      pkgsText = "self.packages.\${pkgs.stdenv.system}";
+    };
 
     settings = mkOption {
       default = {};
@@ -26,23 +29,18 @@ in {
   };
 
   config = mkIf cfg.enable {
-    environment.systemPackages = [defaultPackage];
+    environment.systemPackages = [cfg.package];
 
-    systemd = {
-      packages = [defaultPackage];
-      services.superfreq = {
-        wantedBy = ["multi-user.target"];
-        serviceConfig = let
-          cfgFile = format.generate "superfreq-config.toml" cfg.settings;
-        in {
-          Environment = ["SUPERFREQ_CONFIG=${cfgFile}"];
-          WorkingDirectory = "";
-          ExecStart = "${getExe defaultPackage} daemon --verbose";
-          Restart = "on-failure";
+    systemd.services.superfreq = {
+      wantedBy = ["multi-user.target"];
+      serviceConfig = {
+        Environment = optional (cfg.settings != {}) ["SUPERFREQ_CONFIG=${cfgFile}"];
+        WorkingDirectory = "";
+        ExecStart = "${getExe cfg.package} daemon --verbose";
+        Restart = "on-failure";
 
-          RuntimeDirectory = "superfreq";
-          RuntimeDirectoryMode = "0755";
-        };
+        RuntimeDirectory = "superfreq";
+        RuntimeDirectoryMode = "0755";
       };
     };
 
@@ -55,9 +53,9 @@ in {
         '';
       }
       {
-        assertion = !config.programs.auto-cpufreq.enable;
+        assertion = !config.services.auto-cpufreq.enable;
         message = ''
-          You have set programs.auto-cpufreq.enable = true;
+          You have set services.auto-cpufreq.enable = true;
           which conflicts with Superfreq.
         '';
       }
diff --git a/src/config/load.rs b/src/config/load.rs
index 663f72e..1393a88 100644
--- a/src/config/load.rs
+++ b/src/config/load.rs
@@ -46,7 +46,7 @@ pub fn load_config_from_path(specific_path: Option<&str>) -> Result<AppConfig, C
     }
 
     // System-wide paths
-    config_paths.push(PathBuf::from("/etc/superfreq/config.toml"));
+    config_paths.push(PathBuf::from("/etc/xdg/superfreq/config.toml"));
     config_paths.push(PathBuf::from("/etc/superfreq.toml"));
 
     for path in config_paths {
diff --git a/src/cpu.rs b/src/cpu.rs
index 539aee1..df18e83 100644
--- a/src/cpu.rs
+++ b/src/cpu.rs
@@ -1,6 +1,7 @@
 use crate::core::{GovernorOverrideMode, TurboSetting};
 use crate::util::error::ControlError;
 use core::str;
+use std::path::PathBuf;
 use std::{fs, io, path::Path, string::ToString};
 
 pub type Result<T, E = ControlError> = std::result::Result<T, E>;
@@ -18,12 +19,15 @@ const VALID_EPB_STRINGS: &[&str] = &[
 // Write a value to a sysfs file
 fn write_sysfs_value(path: impl AsRef<Path>, value: &str) -> Result<()> {
     let p = path.as_ref();
+
     fs::write(p, value).map_err(|e| {
         let error_msg = format!("Path: {:?}, Value: '{}', Error: {}", p.display(), value, e);
-        if e.kind() == io::ErrorKind::PermissionDenied {
-            ControlError::PermissionDenied(error_msg)
-        } else {
-            ControlError::WriteError(error_msg)
+        match e.kind() {
+            io::ErrorKind::PermissionDenied => ControlError::PermissionDenied(error_msg),
+            io::ErrorKind::NotFound => {
+                ControlError::PathMissing(format!("Path '{}' does not exist", p.display()))
+            }
+            _ => ControlError::WriteError(error_msg),
         }
     })
 }
@@ -136,6 +140,7 @@ fn get_available_governors() -> Result<Vec<String>> {
     let path = "/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors";
 
     if !Path::new(path).exists() {
+
         return Err(ControlError::NotSupported(
             "Could not determine available governors".to_string(),
         ));
@@ -487,7 +492,7 @@ const GOVERNOR_OVERRIDE_PATH: &str = "/etc/superfreq/governor_override";
 /// Force a specific CPU governor or reset to automatic mode
 pub fn force_governor(mode: GovernorOverrideMode) -> Result<()> {
     // Create directory if it doesn't exist
-    let dir_path = Path::new("/etc/superfreq");
+    let dir_path = Path::new("/etc/xdg/superfreq");
     if !dir_path.exists() {
         fs::create_dir_all(dir_path).map_err(|e| {
             if e.kind() == io::ErrorKind::PermissionDenied {
diff --git a/src/daemon.rs b/src/daemon.rs
index e7b579a..edabb29 100644
--- a/src/daemon.rs
+++ b/src/daemon.rs
@@ -65,7 +65,7 @@ pub fn run_daemon(mut config: AppConfig, verbose: bool) -> Result<(), Box<dyn st
         Some(path)
     } else {
         // Check standard config paths
-        let default_paths = ["/etc/superfreq/config.toml", "/etc/superfreq.toml"];
+        let default_paths = ["/etc/xdg/superfreq/config.toml", "/etc/superfreq.toml"];
 
         default_paths
             .iter()
diff --git a/src/monitor.rs b/src/monitor.rs
index 75ff1ce..b4d4021 100644
--- a/src/monitor.rs
+++ b/src/monitor.rs
@@ -390,25 +390,41 @@ pub fn get_all_cpu_core_info() -> Result<Vec<CpuCoreInfo>> {
 }
 
 pub fn get_cpu_global_info(cpu_cores: &[CpuCoreInfo]) -> CpuGlobalInfo {
-    // FIXME: Assume global settings can be read from cpu0 or are consistent.
-    // This might not work properly for heterogeneous systems (e.g. big.LITTLE)
-    let cpufreq_base_path = Path::new("/sys/devices/system/cpu/cpu0/cpufreq/");
+    // Find a valid CPU to read global settings from
+    // Try cpu0 first, then fall back to any available CPU with cpufreq
+    let mut cpufreq_base_path_buf = PathBuf::from("/sys/devices/system/cpu/cpu0/cpufreq/");
+
+    if !cpufreq_base_path_buf.exists() {
+        let core_count = get_logical_core_count().unwrap_or_else(|e| {
+            eprintln!("Warning: {e}");
+            0
+        });
+        let path = (0..core_count)
+            .map(|i| PathBuf::from(format!("/sys/devices/system/cpu/cpu{i}/cpufreq/")))
+            .find(|path| path.exists());
+        if let Some(test_path_buf) = path {
+            cpufreq_base_path_buf = test_path_buf;
+        }
+    }
+
     let turbo_status_path = Path::new("/sys/devices/system/cpu/intel_pstate/no_turbo");
     let boost_path = Path::new("/sys/devices/system/cpu/cpufreq/boost");
-    let current_governor = if cpufreq_base_path.join("scaling_governor").exists() {
-        read_sysfs_file_trimmed(cpufreq_base_path.join("scaling_governor")).ok()
+
+    let current_governor = if cpufreq_base_path_buf.join("scaling_governor").exists() {
+        read_sysfs_file_trimmed(cpufreq_base_path_buf.join("scaling_governor")).ok()
     } else {
         None
     };
 
-    let available_governors = if cpufreq_base_path
+    let available_governors = if cpufreq_base_path_buf
         .join("scaling_available_governors")
         .exists()
     {
-        read_sysfs_file_trimmed(cpufreq_base_path.join("scaling_available_governors")).map_or_else(
-            |_| vec![],
-            |s| s.split_whitespace().map(String::from).collect(),
-        )
+        read_sysfs_file_trimmed(cpufreq_base_path_buf.join("scaling_available_governors"))
+            .map_or_else(
+                |_| vec![],
+                |s| s.split_whitespace().map(String::from).collect(),
+            )
     } else {
         vec![]
     };
@@ -424,17 +440,16 @@ pub fn get_cpu_global_info(cpu_cores: &[CpuCoreInfo]) -> CpuGlobalInfo {
     } else {
         None
     };
+
     // EPP (Energy Performance Preference)
     let energy_perf_pref =
-        read_sysfs_file_trimmed(cpufreq_base_path.join("energy_performance_preference")).ok();
+        read_sysfs_file_trimmed(cpufreq_base_path_buf.join("energy_performance_preference")).ok();
 
     // EPB (Energy Performance Bias)
     let energy_perf_bias =
-        read_sysfs_file_trimmed(cpufreq_base_path.join("energy_performance_bias")).ok();
+        read_sysfs_file_trimmed(cpufreq_base_path_buf.join("energy_performance_bias")).ok();
 
     let platform_profile = read_sysfs_file_trimmed("/sys/firmware/acpi/platform_profile").ok();
-    let _platform_profile_choices =
-        read_sysfs_file_trimmed("/sys/firmware/acpi/platform_profile_choices").ok();
 
     // Calculate average CPU temperature from the core temperatures
     let average_temperature_celsius = if cpu_cores.is_empty() {
@@ -458,6 +473,7 @@ pub fn get_cpu_global_info(cpu_cores: &[CpuCoreInfo]) -> CpuGlobalInfo {
         }
     };
 
+    // Return the constructed CpuGlobalInfo
     CpuGlobalInfo {
         current_governor,
         available_governors,
diff --git a/src/util/error.rs b/src/util/error.rs
index 51c3162..6ba476f 100644
--- a/src/util/error.rs
+++ b/src/util/error.rs
@@ -9,6 +9,10 @@ pub enum ControlError {
     NotSupported(String),
     PermissionDenied(String),
     InvalidProfile(String),
+    InvalidGovernor(String),
+    ParseError(String),
+    ReadError(String),
+    PathMissing(String),
 }
 
 impl From<io::Error> for ControlError {
@@ -37,6 +41,18 @@ impl std::fmt::Display for ControlError {
                     "Invalid platform control profile {s} supplied, please provide a valid one."
                 )
             }
+            Self::InvalidGovernor(s) => {
+                write!(f, "Invalid governor: {s}")
+            }
+            Self::ParseError(s) => {
+                write!(f, "Failed to parse value: {s}")
+            }
+            Self::ReadError(s) => {
+                write!(f, "Failed to read sysfs path: {s}")
+            }
+            Self::PathMissing(s) => {
+                write!(f, "Path missing: {s}")
+            }
         }
     }
 }