Wrap emacs settings in a mkMerge.

nix/configuration/roles/emacs/default.nix

@@ -39,43 +39,48 @@ let
   e_shorthand = pkgs.writeShellScriptBin "e" ''
     exec ${pkgs.emacs29-pgtk}/bin/emacs "''${@}"
   '';
+
 in
 {
   imports = [ ];
 
-  environment.systemPackages = with pkgs; [
+  config = lib.mkMerge [
-    plainmacs
-    e_shorthand
-    emacs29-pgtk
-    clang # To compile tree-sitter grammars
-    nixd # nix language server
-    nixfmt-rfc-style # auto-formatting nix files through nixd
-  ];
-
-  home-manager.users.talexander =
-    { pkgs, ... }:
     {
-      home.file.".config/emacs" = {
+      environment.systemPackages = with pkgs; [
-        source = ./files/emacs;
+        plainmacs
-        recursive = true;
+        e_shorthand
+        emacs29-pgtk
+        clang # To compile tree-sitter grammars
+        nixd # nix language server
+        nixfmt-rfc-style # auto-formatting nix files through nixd
+      ];
+
+      home-manager.users.talexander =
+        { pkgs, ... }:
+        {
+          home.file.".config/emacs" = {
+            source = ./files/emacs;
+            recursive = true;
+          };
+        };
+
+      environment.persistence."/state" = lib.mkIf (!config.me.buildingIso) {
+        hideMounts = true;
+        users.talexander = {
+          directories = [
+            ".config/emacs/eln-cache" # Installed packages
+            ".config/emacs/elpa" # Installed packages
+            ".config/emacs/private" # For recentf
+            ".config/emacs/tree-sitter" # Compiled tree-sitter grammars
+          ];
+          files = [
+            ".config/emacs/history" # For savehist
+            ".config/emacs/.last-package-update-day" # For use-package
+          ];
+        };
       };
-    };
 
-  environment.persistence."/state" = lib.mkIf (!config.me.buildingIso) {
+      environment.variables.EDITOR = "${plainmacs}/bin/plainmacs";
-    hideMounts = true;
+    }
-    users.talexander = {
+  ];
-      directories = [
-        ".config/emacs/eln-cache" # Installed packages
-        ".config/emacs/elpa" # Installed packages
-        ".config/emacs/private" # For recentf
-        ".config/emacs/tree-sitter" # Compiled tree-sitter grammars
-      ];
-      files = [
-        ".config/emacs/history" # For savehist
-        ".config/emacs/.last-package-update-day" # For use-package
-      ];
-    };
-  };
-
-  environment.variables.EDITOR = "${plainmacs}/bin/plainmacs";
 }