diff --git a/devices.nix b/devices.nix
index ce00fbd..0a9535e 100644
--- a/devices.nix
+++ b/devices.nix
@@ -4,15 +4,17 @@ let
 in
 {
   # keep-sorted start block=yes
-  aur0ra = {
-    system = "aarch64-linux";
-    nixosSystem = nixos-raspberrypi.lib.nixosSystem;
-  };
-  aur0ra-installer = {
-    # build with nix build .\#nixosConfigurations.aur0ra-installer.config.system.build.sdImage
-    system = "aarch64-linux";
-    nixosSystem = nixos-raspberrypi.lib.nixosInstaller;
-  };
+  # disabled: nixos-raspberrypi pins nixos-25.11, which lacks
+  # `services.displayManager.generic` required by stylix release-26.05
+  # aur0ra = {
+  #   system = "aarch64-linux";
+  #   nixosSystem = nixos-raspberrypi.lib.nixosSystem;
+  # };
+  # aur0ra-installer = {
+  #   # build with nix build .\#nixosConfigurations.aur0ra-installer.config.system.build.sdImage
+  #   system = "aarch64-linux";
+  #   nixosSystem = nixos-raspberrypi.lib.nixosInstaller;
+  # };
   epimetheus = {
     system = "aarch64-linux";
   };
@@ -40,7 +42,7 @@ in
       inherit (self.homeConfigurations) muede;
     };
     distributedBuilds = {
-      isBuilder = true;
+      isBuilder = false;
       speedFactor = 14;
       hostPublicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIHGKoZ68wwyVRmPB0SkvpJUyUMDWeFbC5Je9zukyEOh7";
       clientPublicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKAbojdhb3PfazSRmudvo381Y+zUFVLMa7AbWbfK/Zp2 muede-lpt2-nix-builds";
diff --git a/nixosConfigurations/muede-lpt2/default.nix b/nixosConfigurations/muede-lpt2/default.nix
index 3fbabf3..31d08fe 100644
--- a/nixosConfigurations/muede-lpt2/default.nix
+++ b/nixosConfigurations/muede-lpt2/default.nix
@@ -66,5 +66,6 @@
       enable = true;
       hiveName = "pr1ma";
     };
+    services.hyperhive.forge.ci.concurrency = 2;
   };
 }