explicitly sets package for nixvim

modules/nixvim/default.nix

@@ -1,10 +1,11 @@
-{ ... }:
+{ pkgs, ... }:
 
 # These options are imported in nixvim.imports and therefore
 # every option here lives within `programs.nixvim`
 {
   enable = true;
   defaultEditor = true;
+  package = pkgs.neovim-unwrapped;
 
   # Setup some aliases
   vimAlias = true;