Refactor packages

packages/linux.nix

@@ -0,0 +1,26 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}: let
+  inherit (pkgs) stdenv;
+in {
+  # System-wide packages to install.
+  environment.systemPackages = with pkgs; let
+    linux = [
+      cryptsetup
+      glibcLocales
+      iotop
+      linuxPackages.perf
+      netdata
+      pinentry-curses
+      rustup
+      strace
+      tailscale
+    ];
+  in
+    linux;
+
+  programs.gnupg.agent.enable = true;
+}