🐛 Fix build errors on pi4, added configs to push

hosts/pi4/default.nix

@@ -1,8 +1,6 @@
 {
   pkgs,
-  hostName,
-  user,
-  version,
+  systemConfig,
   ...
 }:
 
@@ -35,19 +33,25 @@
   hardware.enableRedistributableFirmware = true;
 
   networking = {
-    inherit hostName;
+    hostName = systemConfig.hostName;
     networkmanager.enable = true;
   };
 
   services.openssh.enable = true;
 
-  system.stateVersion = version;
+  programs.gnupg.agent = {
+    enable = true;
+    enableSSHSupport = true;
+  };
+  services.pcscd.enable = true;
+
+  system.stateVersion = systemConfig.version;
 
   users = {
     mutableUsers = false;
-    users.${user.name} = {
+    users.${systemConfig.user.name} = {
       isNormalUser = true;
-      password = user.password;
+      password = systemConfig.user.password;
       extraGroups = [ "wheel" ];
     };
   };