NixOS systems config for laptop

users/root.nix

@@ -0,0 +1,51 @@
+{ config, pkgs, lib, ... }:
+
+let
+  # Fetch upstream OMP theme once
+  jyumppTheme = pkgs.fetchurl {
+    url = "https://raw.githubusercontent.com/Jyumpp/jyumpp-zsh-theme/refs/heads/master/.jyumpp.omp.json";
+    # After first build Nix will show the wanted hash; add it here for reproducibility:
+    sha256 = "sha256-jsN3hkyT0dJNTYEmDHQPp++oscQLgYGNj7PZAcIW2TA=";
+  };
+
+  # Make a root variant with red username (wraps {{ .UserName }} with ANSI red)
+  jyumppRootTheme = pkgs.runCommand "jyumpp-root.omp.json" {} ''
+    sed -E 's|\{\{[[:space:]]*\.UserName[[:space:]]*\}\}|<#FF3B30>{{ .UserName }}</>|g' \
+      ${jyumppTheme} > $out
+'';
+in
+{
+  home.username = "root";
+  home.homeDirectory = "/root";
+  home.stateVersion = "25.05";
+
+  programs.zsh = {
+    enable = true;
+
+    # Plugins
+    historySubstringSearch = {
+      enable = true;
+      searchDownKey = "^[[B";
+      searchUpKey = "^[[A";
+    };
+
+    history = {
+      append = true;
+    };
+
+    autosuggestion.enable = true;
+
+    syntaxHighlighting.enable = true;
+  };
+
+  programs.oh-my-posh = {
+    enable = true;
+    enableBashIntegration = true;
+    enableZshIntegration = true;
+    settings = builtins.fromJSON (builtins.unsafeDiscardStringContext (builtins.readFile(jyumppRootTheme)));
+
+  };
+
+  # Add any root-specific HM packages if desired
+  home.packages = [ ];
+}