added

modules/default.nix

@@ -18,6 +18,7 @@
     ./timezone.nix
     ./user.nix
     ./systemd.nix
+    ./man.nix
   ];
 
   # Enable CUPS to print documents.

modules/man.nix

@@ -0,0 +1,42 @@
+{ config, pkgs, lib, ... }:
+{
+  documentation = {
+    enable = true;
+    dev.enable = true;
+    doc.enable = true;
+    info.enable = true;
+    man = {
+      enable = true;
+      generateCaches = true;
+    };
+    nixos.enable = true;
+  };
+
+  environment.pathsToLink = [ "/share/man" "/share/doc" ];
+
+  environment.systemPackages = with pkgs; [
+    man-pages
+    man-pages-posix
+    stdmanpages
+    docutils
+    python311Packages.docutils
+    python311Packages.docstr-coverage
+    python310Packages.docutils
+    python310Packages.docstr-coverage
+    texlivePackages.documentation
+    docbook5
+    docbook-xsl-ns
+    docbook-xsl-nons
+    doctoc
+    doctave
+    documentation-highlighter
+  ];
+
+  environment.variables = {
+    MANPATH = [
+      "${config.system.path}/share/man"
+      "${pkgs.man-pages}/share/man"
+      "${pkgs.man-pages-posix}/share/man"
+    ];
+  };
+}