diff --git a/nixos/modules/security/hidepid.nix b/nixos/modules/security/hidepid.nix
index 4917327d617c..8f2df380cfe8 100644
--- a/nixos/modules/security/hidepid.nix
+++ b/nixos/modules/security/hidepid.nix
@@ -20,6 +20,6 @@ with lib;
   config = mkIf config.security.hideProcessInformation {
     users.groups.proc.gid = config.ids.gids.proc;
 
-    fileSystems."/proc".options = [ "hidepid=2" "gid=${toString config.ids.gids.proc}" ];
+    boot.specialFileSystems."/proc".options = [ "hidepid=2" "gid=${toString config.ids.gids.proc}" ];
   };
 }