diff --git a/build04/configuration.nix b/build04/configuration.nix
index 3247b33..5dc2114 100644
--- a/build04/configuration.nix
+++ b/build04/configuration.nix
@@ -9,8 +9,8 @@
 
   nixpkgs.system = "aarch64-linux";
 
-  # disable default features
-  nix.settings.system-features = [ ];
+  # disable kvm/nixos-tests
+  nix.settings.system-features = [ "big-parallel" ]; # sync with roles/remote-builder/aarch64-build04.nix
 
   # we use grub because systemd-boot sometimes fail on aarch64/EFI
   # XXX check if this is still an issue?
diff --git a/roles/remote-builder/aarch64-build04.nix b/roles/remote-builder/aarch64-build04.nix
index 17e4c0e..d4ac8eb 100644
--- a/roles/remote-builder/aarch64-build04.nix
+++ b/roles/remote-builder/aarch64-build04.nix
@@ -9,6 +9,7 @@
       sshKey = config.sops.secrets.id_buildfarm.path;
       sshUser = "nix";
       system = "aarch64-linux";
+      supportedFeatures = [ "big-parallel" ]; # sync with build04/configuration.nix
     }
   ];
   sops.secrets.id_buildfarm = { };