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)}
diff --git a/flake.lock b/flake.lock
index c8a5aa3..fe32570 100644
--- a/flake.lock
+++ b/flake.lock
@@ -156,11 +156,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1730190761,
-        "narHash": "sha256-o5m5WzvY6cGIDupuOvjgNSS8AN6yP2iI9MtUC6q/uos=",
+        "lastModified": 1730675461,
+        "narHash": "sha256-Mhqz3p/HEiI/zxBJWO57LYQf6gGlJB0tci6fiVXLjd8=",
         "owner": "nix-community",
         "repo": "disko",
-        "rev": "3979285062d6781525cded0f6c4ff92e71376b55",
+        "rev": "380847d94ff0fedee8b50ee4baddb162c06678df",
         "type": "github"
       },
       "original": {
@@ -542,11 +542,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1730490306,
-        "narHash": "sha256-AvCVDswOUM9D368HxYD25RsSKp+5o0L0/JHADjLoD38=",
+        "lastModified": 1730633670,
+        "narHash": "sha256-ZFJqIXpvVKvzOVFKWNRDyIyAo+GYdmEPaYi1bZB6uf0=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "1743615b61c7285976f85b303a36cdf88a556503",
+        "rev": "8f6ca7855d409aeebe2a582c6fd6b6a8d0bf5661",
         "type": "github"
       },
       "original": {
@@ -878,11 +878,11 @@
     },
     "nixpkgs-stable_2": {
       "locked": {
-        "lastModified": 1729973466,
-        "narHash": "sha256-knnVBGfTCZlQgxY1SgH0vn2OyehH9ykfF8geZgS95bk=",
+        "lastModified": 1730602179,
+        "narHash": "sha256-efgLzQAWSzJuCLiCaQUCDu4NudNlHdg2NzGLX5GYaEY=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "cd3e8833d70618c4eea8df06f95b364b016d4950",
+        "rev": "3c2f1c4ca372622cb2f9de8016c9a0b1cbd0f37c",
         "type": "github"
       },
       "original": {
@@ -926,11 +926,11 @@
     },
     "nixpkgs_4": {
       "locked": {
-        "lastModified": 1730200266,
-        "narHash": "sha256-l253w0XMT8nWHGXuXqyiIC/bMvh1VRszGXgdpQlfhvU=",
+        "lastModified": 1730531603,
+        "narHash": "sha256-Dqg6si5CqIzm87sp57j5nTaeBbWhHFaVyG7V6L8k3lY=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "807e9154dcb16384b1b765ebe9cd2bba2ac287fd",
+        "rev": "7ffd9ae656aec493492b44d0ddfb28e79a1ea25d",
         "type": "github"
       },
       "original": {
@@ -1038,11 +1038,11 @@
         "nixpkgs-stable": "nixpkgs-stable_2"
       },
       "locked": {
-        "lastModified": 1729999681,
-        "narHash": "sha256-qm0uCtM9bg97LeJTKQ8dqV/FvqRN+ompyW4GIJruLuw=",
+        "lastModified": 1730605784,
+        "narHash": "sha256-1NveNAMLHbxOg0BpBMSVuZ2yW2PpDnZLbZ25wV50PMc=",
         "owner": "Mic92",
         "repo": "sops-nix",
-        "rev": "1666d16426abe79af5c47b7c0efa82fd31bf4c56",
+        "rev": "e9b5eef9b51cdf966c76143e13a9476725b2f760",
         "type": "github"
       },
       "original": {