feat: add emacs-overlay

Signed-off-by: Lander Van den Bulcke <landervandenbulcke@gmail.com>

flake.nix

@@ -39,6 +39,11 @@
       inputs.nixpkgs.follows = "nixpkgs";
     };
 
+    # emacs overlay
+    emacs-overlay = {
+      url = "github:nix-community/emacs-overlay";
+    };
+
     # tidalcycles
     tidalcycles = {
       url = "github:mitchmindtree/tidalcycles.nix";
@@ -49,6 +54,7 @@
     {
       self,
       nixpkgs,
+      emacs-overlay,
       tidalcycles,
       ...
     }@inputs:
@@ -61,7 +67,12 @@
         wodan = nixpkgs.lib.nixosSystem {
           specialArgs = { inherit inputs outputs; };
           modules = [
-            { nixpkgs.overlays = [ tidalcycles.overlays.default ]; }
+            {
+              nixpkgs.overlays = [
+                emacs-overlay.overlays.default
+                tidalcycles.overlays.default
+              ];
+            }
             ./hosts/wodan
           ];
         };