Upgraded snowfall lib

modules/nixos/system/fonts/default.nix

@@ -0,0 +1,23 @@
+{
+  options,
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+with lib; let
+  cfg = config.aa.system.fonts;
+in {
+  options.aa.system.fonts = with types; {
+    enable = mkEnableOption "manage fonts";
+  };
+
+  config = mkIf cfg.enable {
+    fonts.packages = with pkgs; [
+      noto-fonts
+      noto-fonts-cjk
+      noto-fonts-emoji
+      (nerdfonts.override {fonts = ["Hack"];})
+    ];
+  };
+}

modules/nixos/system/monitoring/default.nix

@@ -0,0 +1,27 @@
+{
+  options,
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+with lib; let
+  cfg = config.aa.system.monitoring;
+in {
+  options.aa.system.monitoring = with types; {
+    enable = mkEnableOption "monitoring";
+  };
+
+  config = mkIf cfg.enable {
+    environment.systemPackages = with pkgs; [
+      htop
+      lm_sensors
+      powertop
+      zenith
+    ];
+
+    powerManagement.powertop.enable = true;
+
+    aa.apps.btop.enable = true;
+  };
+}

modules/nixos/system/zfs/default.nix

@@ -0,0 +1,29 @@
+{
+  options,
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+with lib; let
+  cfg = config.aa.system.zfs;
+in {
+  options.aa.system.zfs = with types; {
+    enable = mkEnableOption "zfs";
+    # TODO: Introduce a zfsOnRoot option
+  };
+
+  config = mkIf cfg.enable {
+    environment.systemPackages = [pkgs.zfs-prune-snapshots];
+
+    services.zfs = {
+      autoScrub.enable = true;
+      # Still need to set `com.sun:auto-snapshot` to `true` on datasets
+      # zfs set com.sun:auto-snapshot=true pool/dataset
+      autoSnapshot = {
+        enable = true;
+        flags = "-k -p --utc";
+      };
+    };
+  };
+}