diff --git a/hosts/hydra/default.nix b/hosts/hydra/default.nix
index 724ee9f3..9d30858f 100644
--- a/hosts/hydra/default.nix
+++ b/hosts/hydra/default.nix
@@ -30,7 +30,8 @@ in
     buildMachines = [{
       hostName = "client@dacbert.hq.c3d2.de";
       system = lib.concatStringsSep "," [
-        "aarch64-linux" "armv6l-linux" "armv7l-linux"
+        # "aarch64-linux" # very slow compared to gallium
+        "armv6l-linux" "armv7l-linux"
       ];
       supportedFeatures = [ "kvm" "nixos-test" ];
       maxJobs = 1;