feat(nix): use emacs-overlay

flake.nix

@@ -33,6 +33,11 @@
       url = "git+https://git.orion-technologies.io/blog/blog";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+    emacs-overlay = {
+      url = "github:nix-community/emacs-overlay";
+      inputs.nixpkgs.follows = "nixpkgs";
+      inputs.flake-utils.follows = "flake-utils";
+    };
   };
 
   outputs =
@@ -77,6 +82,7 @@
             ({
               imports = [ inputs.agenix.homeManagerModules.default ];
               nixpkgs.overlays = [
+                inputs.emacs-overlay.overlays.default
                 self.overlays.modifications
                 self.overlays.additions
               ];

users/price/conf/emacs/default.nix

@@ -0,0 +1,15 @@
+{ pkgs, ... }:
+{
+  programs.emacs = {
+    enable = true;
+    package = pkgs.emacs-unstable;
+    extraPackages = (
+      epkgs:
+      (with epkgs; [
+        treesit-grammars.with-all-grammars
+        melpaPackages.pdf-tools
+        vterm
+      ])
+    );
+  };
+}

users/price/home.nix

@@ -255,16 +255,6 @@ in
       enable = true;
       package = pkgs.eclipses.eclipse-java;
     };
-    emacs = {
-      enable = true;
-      extraPackages = (
-        epkgs:
-        (with epkgs; [
-          treesit-grammars.with-all-grammars
-          melpaPackages.pdf-tools
-        ])
-      );
-    };
     wofi.enable = true;
     firefox = {
       enable = true;