nixos/neovim: add /share/nvim to pathsToLink

nixos/modules/programs/neovim.nix

@@ -150,6 +150,10 @@ in
       cfg.finalPackage
     ];
     environment.variables.EDITOR = lib.mkIf cfg.defaultEditor (lib.mkOverride 900 "nvim");
+    # On most NixOS configurations /share is already included, so it includes
+    # this directory as well. But  This makes sure that /share/nvim/site paths
+    # from other packages will be used by neovim.
+    environment.pathsToLink = [ "/share/nvim" ];
 
     environment.etc = builtins.listToAttrs (builtins.attrValues (builtins.mapAttrs
       (name: value: {