Made git config conditional based on home-manager version

home/shared.nix

@@ -1,16 +1,20 @@
-{ ... }: {
+{ options, ... }: {
 
   nixpkgs.config.allowUnfree = true;
   fonts.fontconfig.enable = true;
 
   programs = {
     home-manager.enable = true;
-    git = {
+    git = if builtins.hasAttr "settings" options.programs.git then {
       enable = true;
       settings.user = {
         name = "Random936";
         email = "randomdude936@gmail.com";
       };
+    } else {
+      enable = true;
+      userName = "Random936";
+      userEmail = "randomdude936@gmail.com";
     };
   };