Install aspell into the emacs_full environment.

nix/configuration/roles/emacs/default.nix

@@ -39,7 +39,6 @@ let
   e_shorthand = pkgs.writeShellScriptBin "e" ''
     exec ${pkgs.emacs29-pgtk}/bin/emacs "''${@}"
   '';
-
 in
 {
   imports = [ ];
@@ -49,12 +48,41 @@ in
       environment.systemPackages = with pkgs; [
         plainmacs
         e_shorthand
-        emacs29-pgtk
+        emacs_full
         clang # To compile tree-sitter grammars
         nixd # nix language server
         nixfmt-rfc-style # auto-formatting nix files through nixd
       ];
 
+      nixpkgs.overlays = [
+        (final: prev: {
+          emacs_full = pkgs.buildEnv {
+            name = "emacs_full";
+            paths = with pkgs; [
+              emacs29-pgtk
+              (pkgs.aspellWithDicts (
+                dicts: with dicts; [
+                  en
+                  en-computers
+                ]
+              ))
+            ];
+            pathsToLink = [
+              "/share/man"
+              "/share/doc"
+              "/share/info"
+              "/bin"
+              "/etc"
+            ];
+            extraOutputsToInstall = [
+              "man"
+              "doc"
+              "info"
+            ];
+          };
+        })
+      ];
+
       home-manager.users.talexander =
         { pkgs, ... }:
         {