👽 nix-darwin homebrew changes

nix/modules/base/darwin.nix

@@ -37,10 +37,9 @@
 
   homebrew = {
     enable = true;
-    brewPrefix = "/opt/homebrew/bin";
+    prefix = "/opt/homebrew";
     global = {
       brewfile = true;
-      lockfiles = false;
     };
     onActivation = {
       autoUpdate = true;