diff --git a/config/services/hydra/nix-config.nix b/config/services/hydra/nix-config.nix
index b4a2faa..6d7c579 100644
--- a/config/services/hydra/nix-config.nix
+++ b/config/services/hydra/nix-config.nix
@@ -22,12 +22,21 @@
     {
       hostName = "schrodinger.kyouma.net";
       sshUser = "root";
-      maxJobs = 2;
+      maxJobs = 0;
       speedFactor = 20;
       systems = [ "riscv64-linux" ];
       supportedFeatures = base ++ [ "gccarch-rv64imac" "gccarch-rv64imacfd" ];
       sshKey = config.sops.secrets."services/hydra/id_ed25519_hydra".path;
     }
+    {
+      hostName = "machine-0008.cloud-v.co";
+      sshUser = "root";
+      maxJobs = 2;
+      speedFactor = 4;
+      systems = [ "riscv64-linux" ];
+      supportedFeatures = base ++ [ "gccarch-rv64imac" "gccarch-rv64imacfd" ];
+      sshKey = config.sops.secrets."services/hydra/id_ed25519_hydra".path;
+    }
   ] ++ lib.forEach (lib.genList (i: i + 1) 8) (num: {
       hostName = "build-worker-0${toString num}";
       sshUser = "root";
@@ -37,12 +46,9 @@
       supportedFeatures = [ "nixos-test" "benchmark" "big-parallel" "gccarch-x86-64" "gccarch-x86-64-v2" "gccarch-x86-64-v3" ];
       sshKey = config.sops.secrets."services/hydra/id_ed25519_hydra".path;
   });
-  nix.distributedBuilds = true;
   nixpkgs.config.allowUnsupportedSystem = true;
-  nix.gc = {
-    dates = "monthly";
-    options = lib.mkForce "--delete-older-than 90d";
-  };
+  nix.distributedBuilds = true;
+  nix.gc.automatic = lib.mkForce false;
   nix.settings = {
     allowed-uris = [
       "github:"
@@ -57,6 +63,7 @@
       "build-worker-04.nyantec.com".publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICOq+5I+nlAN2lJoOtoXrYEDuZ/TMPMa43pIlablYigK";
       "integra.kyouma.net".publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIBwEQiSfaDrUAwgul4mktusBPcIVxI4pLNDh9DPopVU";
       "schrodinger.kyouma.net".publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKo7vZ6lS1wx76YsbAdhOsGcc20YMAW52ep8SZ/FCHDp";
+      "[machine.cloud-v.co]:20008".publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIK6Kri0cjPKEXXDEl2GwfwzPO9wuPZEgJS0M6lKRHCqH";
       "localhost".publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPNVavo3YHVsrYwXRVISu7kDoknn+5inFGySn4azlB8P";
       "[build-worker-kyoumanet.fly.dev]:2201".publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDL2M97UBHg9aUfjDUxzmzg1r0ga0m3/stummBVwuEAB";
       "[build-worker-kyoumanet.fly.dev]:2202".publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOTwVKL0P0chPM2Gz23rbT94844+w1CGJdCaZdzfjThz";
@@ -67,7 +74,11 @@
       "[build-worker-kyoumanet.fly.dev]:2207".publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIL9z95a6Fn/dB+iNigEYpuJdBnBwCkIZYaKHcFbGP+RY";
       "[build-worker-kyoumanet.fly.dev]:2208".publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIAk+FNMhTfAVqk3MfLp4QiG/i5ti53DlpnC0q+sOvU9O";
     }; 
-    extraConfig = lib.concatLines (lib.genList (i: ''
+    extraConfig = ''
+      Host machine-0008.cloud-v.co
+        Hostname machine.cloud-v.co
+        Port 20008
+    '' + lib.concatLines (lib.genList (i: ''
       Host build-worker-0${toString (i + 1)}
         Hostname build-worker-kyoumanet.fly.dev
         Port 220${toString (i + 1)}