Common/helix: change nil lsp settings

roles/common/programs/helix.nix

@@ -1,4 +1,4 @@
-{pkgs, ...}: {
+{pkgs, config, ...}: {
   home-manager.users.toast = {
     programs.helix = {
       enable = true;
@@ -32,6 +32,14 @@
             formatter.command = "nixpkgs-fmt";
           }
         ];
+        language-server.nil = {
+          config = {
+            flake = {
+              autoArchive = false;
+              autoEvalInputs = true;
+            };
+          };
+        };
       };
     };
   };