fix(writeElispBin): Add required nixpkgs attributes for elisp

overrides/writeElispBin.nix

@@ -1,9 +1,9 @@
 { pkgs, ... }:
 
-{ name, src, deps ? (_: []), emacs ? pkgs.emacs26-nox }:
+{ name, src, deps ? (_: []), emacs ? pkgs.third_party.emacs26-nox }:
 
 let
-  inherit (pkgs) emacsPackagesFor writeTextFile;
+  inherit (pkgs.third_party) emacsPackagesFor writeTextFile;
   inherit (builtins) isString toFile;
 
   finalEmacs = (emacsPackagesFor emacs).emacsWithPackages deps;

third_party/default.nix

@@ -24,6 +24,8 @@ let
       buildGoPackage
       cargo
       darwin
+      emacs26-nox
+      emacsPackagesFor
       fetchFromGitHub
       google-cloud-sdk
       haskell
@@ -38,7 +40,8 @@ let
       symlinkJoin
       tree
       writeShellScriptBin
-      writeText;
+      writeText
+      writeTextFile;
   };
 
 in exposed // {