diff --git a/config/services/hydra/default.nix b/config/services/hydra/default.nix
index 97390b4..5f85023 100644
--- a/config/services/hydra/default.nix
+++ b/config/services/hydra/default.nix
@@ -1,6 +1,7 @@
-{ config, ... }: {
+{ config, inputs, lib, ... }: {
   imports = [
     ./nix-config.nix
+    inputs.lix-module.nixosModules.default
   ];
   sops.secrets."services/hydra/signKey" = {
     owner = "hydra-queue-runner";
@@ -18,8 +19,12 @@
   };
   kyouma.deployment.auto-upgrade.cache = "daemon";
 
+  nix.package = lib.mkForce inputs.lix-module.packages.${config.nixpkgs.hostPlatform.system}.default;
+  nix.settings.experimental-features = lib.mkForce [ "nix-command" "flakes" "pipe-operator" ];
+
   services.hydra = {
     enable = true;
+    package = inputs.hydra.packages.${config.nixpkgs.hostPlatform.system}.hydra;
     hydraURL = "https://hydra.kyouma.net";
     listenHost = "localhost";
     notificationSender = "hydra@hydra.kyouma.net";
diff --git a/flake.lock b/flake.lock
index a204000..9b92cef 100644
--- a/flake.lock
+++ b/flake.lock
@@ -280,6 +280,22 @@
       }
     },
     "flake-compat_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1696426674,
+        "narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-compat_3": {
       "locked": {
         "lastModified": 1696426674,
         "narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=",
@@ -293,7 +309,7 @@
         "url": "https://flakehub.com/f/edolstra/flake-compat/1.tar.gz"
       }
     },
-    "flake-compat_3": {
+    "flake-compat_4": {
       "flake": false,
       "locked": {
         "lastModified": 1673956053,
@@ -310,6 +326,28 @@
       }
     },
     "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": [
+          "hydra",
+          "nix-eval-jobs",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1722555600,
+        "narHash": "sha256-XOQkdLafnb/p9ij77byFQjDf5m5QYl9b2REiVClC+x4=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "8471fe90ad337a8074e957b69ca4d0089218391d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "flake-parts_2": {
       "inputs": {
         "nixpkgs-lib": [
           "nixvim",
@@ -366,6 +404,39 @@
         "type": "github"
       }
     },
+    "flake-utils_3": {
+      "inputs": {
+        "systems": "systems_3"
+      },
+      "locked": {
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "flakey-profile": {
+      "locked": {
+        "lastModified": 1712898590,
+        "narHash": "sha256-FhGIEU93VHAChKEXx905TSiPZKga69bWl1VB37FK//I=",
+        "owner": "lf-",
+        "repo": "flakey-profile",
+        "rev": "243c903fd8eadc0f63d205665a92d4df91d42d9d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "lf-",
+        "repo": "flakey-profile",
+        "type": "github"
+      }
+    },
     "fromYaml": {
       "flake": false,
       "locked": {
@@ -471,6 +542,28 @@
         "type": "github"
       }
     },
+    "hydra": {
+      "inputs": {
+        "lix": [
+          "lix"
+        ],
+        "nix-eval-jobs": "nix-eval-jobs",
+        "nixpkgs": "nixpkgs_2"
+      },
+      "locked": {
+        "lastModified": 1724017314,
+        "narHash": "sha256-FFv/JT+A7xG6H1FN6aEHWzhrHXtw16BkSmBx0wgmC9U=",
+        "ref": "refs/heads/main",
+        "rev": "3ee51dbe589458cc54ff753317bbc6db530bddc0",
+        "revCount": 4201,
+        "type": "git",
+        "url": "https://git.lix.systems/lix-project/hydra.git"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://git.lix.systems/lix-project/hydra.git"
+      }
+    },
     "iceshrimp": {
       "inputs": {
         "nixpkgs": [
@@ -514,6 +607,61 @@
         "url": "https://woof.rip/emily/kyouma-net.git"
       }
     },
+    "lix": {
+      "inputs": {
+        "flake-compat": "flake-compat_2",
+        "nix2container": "nix2container",
+        "nixpkgs": "nixpkgs_3",
+        "nixpkgs-regression": "nixpkgs-regression",
+        "pre-commit-hooks": "pre-commit-hooks"
+      },
+      "locked": {
+        "lastModified": 1723503926,
+        "narHash": "sha256-Rosl9iA9MybF5Bud4BTAQ9adbY81aGmPfV8dDBGl34s=",
+        "rev": "bcaeb6388b8916ac6d1736e3aa2b13313e6a6bd2",
+        "type": "tarball",
+        "url": "https://git.lix.systems/api/v1/repos/lix-project/lix/archive/bcaeb6388b8916ac6d1736e3aa2b13313e6a6bd2.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://git.lix.systems/lix-project/lix/archive/2.91.0.tar.gz"
+      }
+    },
+    "lix-module": {
+      "inputs": {
+        "flake-utils": "flake-utils_2",
+        "flakey-profile": "flakey-profile",
+        "lix": "lix_2",
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1723510904,
+        "narHash": "sha256-zNW/rqNJwhq2lYmQf19wJerRuNimjhxHKmzrWWFJYts=",
+        "rev": "622a2253a071a1fb97a4d3c8103a91114acc1140",
+        "type": "tarball",
+        "url": "https://git.lix.systems/api/v1/repos/lix-project/nixos-module/archive/622a2253a071a1fb97a4d3c8103a91114acc1140.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://git.lix.systems/lix-project/nixos-module/archive/2.91.0.tar.gz"
+      }
+    },
+    "lix_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1723503926,
+        "narHash": "sha256-Rosl9iA9MybF5Bud4BTAQ9adbY81aGmPfV8dDBGl34s=",
+        "rev": "bcaeb6388b8916ac6d1736e3aa2b13313e6a6bd2",
+        "type": "tarball",
+        "url": "https://git.lix.systems/api/v1/repos/lix-project/lix/archive/bcaeb6388b8916ac6d1736e3aa2b13313e6a6bd2.tar.gz?rev=bcaeb6388b8916ac6d1736e3aa2b13313e6a6bd2"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://git.lix.systems/lix-project/lix/archive/2.91.0.tar.gz"
+      }
+    },
     "nix-darwin": {
       "inputs": {
         "nixpkgs": [
@@ -535,6 +683,72 @@
         "type": "github"
       }
     },
+    "nix-eval-jobs": {
+      "inputs": {
+        "flake-parts": "flake-parts",
+        "lix": [
+          "hydra",
+          "lix"
+        ],
+        "nix-github-actions": "nix-github-actions",
+        "nixpkgs": [
+          "hydra",
+          "nixpkgs"
+        ],
+        "treefmt-nix": "treefmt-nix"
+      },
+      "locked": {
+        "lastModified": 1723579251,
+        "narHash": "sha256-xnHtfw0gRhV+2S9U7hQwvp2klTy1Iv7FlMMO0/WiMVc=",
+        "ref": "refs/heads/main",
+        "rev": "42a160bce2fd9ffebc3809746bc80cc7208f9b08",
+        "revCount": 609,
+        "type": "git",
+        "url": "https://git.lix.systems/lix-project/nix-eval-jobs"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://git.lix.systems/lix-project/nix-eval-jobs"
+      }
+    },
+    "nix-github-actions": {
+      "inputs": {
+        "nixpkgs": [
+          "hydra",
+          "nix-eval-jobs",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1720066371,
+        "narHash": "sha256-uPlLYH2S0ACj0IcgaK9Lsf4spmJoGejR9DotXiXSBZQ=",
+        "owner": "nix-community",
+        "repo": "nix-github-actions",
+        "rev": "622f829f5fe69310a866c8a6cd07e747c44ef820",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nix-github-actions",
+        "type": "github"
+      }
+    },
+    "nix2container": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1720642556,
+        "narHash": "sha256-qsnqk13UmREKmRT7c8hEnz26X3GFFyIQrqx4EaRc1Is=",
+        "owner": "nlewo",
+        "repo": "nix2container",
+        "rev": "3853e5caf9ad24103b13aa6e0e8bcebb47649fe4",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nlewo",
+        "repo": "nix2container",
+        "type": "github"
+      }
+    },
     "nixos-hardware": {
       "locked": {
         "lastModified": 1724067415,
@@ -586,6 +800,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-regression": {
+      "locked": {
+        "lastModified": 1643052045,
+        "narHash": "sha256-uGJ0VXIhWKGXxkeNnq4TvV3CIOkUJ3PAoLZ3HMzNVMw=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
+        "type": "github"
+      }
+    },
     "nixpkgs-stable": {
       "locked": {
         "lastModified": 1720535198,
@@ -619,6 +849,38 @@
       }
     },
     "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1723688146,
+        "narHash": "sha256-sqLwJcHYeWLOeP/XoLwAtYjr01TISlkOfz+NG82pbdg=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "c3d4ac725177c030b1e289015989da2ad9d56af0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-24.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_3": {
+      "locked": {
+        "lastModified": 1721931987,
+        "narHash": "sha256-1Zg8LY0T5EfXtv0Kf4M6SFnjH7Eto4VV+EKJ/YSnhiI=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "e21630230c77140bc6478a21cd71e8bb73706fce",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-24.05-small",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_4": {
       "locked": {
         "lastModified": 1723991338,
         "narHash": "sha256-Grh5PF0+gootJfOJFenTTxDTYPidA3V28dqJ/WV7iis=",
@@ -637,8 +899,8 @@
     "nixvim": {
       "inputs": {
         "devshell": "devshell",
-        "flake-compat": "flake-compat_2",
-        "flake-parts": "flake-parts",
+        "flake-compat": "flake-compat_3",
+        "flake-parts": "flake-parts_2",
         "git-hooks": "git-hooks",
         "home-manager": [
           "home-manager"
@@ -648,7 +910,7 @@
           "nixpkgs"
         ],
         "nuschtosSearch": "nuschtosSearch",
-        "treefmt-nix": "treefmt-nix"
+        "treefmt-nix": "treefmt-nix_2"
       },
       "locked": {
         "lastModified": 1724188973,
@@ -666,7 +928,7 @@
     },
     "nuschtosSearch": {
       "inputs": {
-        "flake-utils": "flake-utils_2",
+        "flake-utils": "flake-utils_3",
         "nixpkgs": [
           "nixvim",
           "nixpkgs"
@@ -686,6 +948,22 @@
         "type": "github"
       }
     },
+    "pre-commit-hooks": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1721042469,
+        "narHash": "sha256-6FPUl7HVtvRHCCBQne7Ylp4p+dpP3P/OYuzjztZ4s70=",
+        "owner": "cachix",
+        "repo": "git-hooks.nix",
+        "rev": "f451c19376071a90d8c58ab1a953c6e9840527fd",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "repo": "git-hooks.nix",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "attic": "attic",
@@ -694,11 +972,14 @@
         "fernglas": "fernglas",
         "flake-utils": "flake-utils",
         "home-manager": "home-manager",
+        "hydra": "hydra",
         "iceshrimp": "iceshrimp",
         "kyouma-www": "kyouma-www",
+        "lix": "lix",
+        "lix-module": "lix-module",
         "nixos-hardware": "nixos-hardware",
         "nixos-needsreboot": "nixos-needsreboot",
-        "nixpkgs": "nixpkgs_2",
+        "nixpkgs": "nixpkgs_4",
         "nixvim": "nixvim",
         "sops-nix": "sops-nix",
         "stylix": "stylix"
@@ -734,7 +1015,7 @@
         "base16-kitty": "base16-kitty",
         "base16-tmux": "base16-tmux",
         "base16-vim": "base16-vim",
-        "flake-compat": "flake-compat_3",
+        "flake-compat": "flake-compat_4",
         "gnome-shell": "gnome-shell",
         "home-manager": [
           "home-manager"
@@ -787,7 +1068,44 @@
         "type": "github"
       }
     },
+    "systems_3": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
     "treefmt-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "hydra",
+          "nix-eval-jobs",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1723454642,
+        "narHash": "sha256-S0Gvsenh0II7EAaoc9158ZB4vYyuycvMGKGxIbERNAM=",
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "rev": "349de7bc435bdff37785c2466f054ed1766173be",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "type": "github"
+      }
+    },
+    "treefmt-nix_2": {
       "inputs": {
         "nixpkgs": [
           "nixvim",
diff --git a/flake.nix b/flake.nix
index 5b10af3..68f513a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -20,13 +20,16 @@
     };
     fernglas = {
       url = "github:wobcom/fernglas";
-      #inputs.nixpkgs.follows = "nixpkgs";
       inputs.flake-utils.follows = "flake-utils";
     };
     home-manager = {
       url = "github:nix-community/home-manager";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+    hydra = {
+      url = "git+https://git.lix.systems/lix-project/hydra.git";
+      inputs.lix.follows = "lix";
+    };
     iceshrimp = {
       url = "git+https://iceshrimp.dev/iceshrimp/packaging";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -36,6 +39,11 @@
       inputs.nixpkgs.follows = "nixpkgs";
       inputs.flake-utils.follows = "flake-utils";
     };
+    lix.url = "https://git.lix.systems/lix-project/lix/archive/2.91.0.tar.gz";
+    lix-module = {
+      url = "https://git.lix.systems/lix-project/nixos-module/archive/2.91.0.tar.gz";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
     nixos-needsreboot = {
       url = "github:thefossguy/nixos-needsreboot";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -64,10 +72,6 @@
       "cache.kyouma.net:Frjwu4q1rnwE/MnSTmX9yx86GNA/z3p/oElGvucLiZg="
     ];
     builders-use-substitutes = true;
-    builders = ''
-      ssh://build@seras.kyouma.net x86_64-linux - 40 40 nixos-test,benchmark,big-parallel,kvm
-      ssh://build@integra.kyouma.net aarch64-linux - 4 8 nixos-test,benchmark,big-parallel,kvm
-    '';
   };
 
   outputs = { self, nixpkgs, flake-utils, ... }@inputs: let
diff --git a/pkgs/build-worker-oci/default.nix b/pkgs/build-worker-oci/default.nix
index 745c8ec..a5ea5b4 100644
--- a/pkgs/build-worker-oci/default.nix
+++ b/pkgs/build-worker-oci/default.nix
@@ -36,7 +36,7 @@ dockerTools.buildLayeredImage {
     max-silent-time = 14400
     min-free = 17179869184
     max-free = 34359738368
-    system-features = benchmark big-parallel kvm nixos-test uid-range gccarch-x86-64-v3
+    system-features = benchmark big-parallel kvm nixos-test uid-range gccarch-x86-64 gccarch-x86-64-v2 gccarch-x86-64-v3
     EOF
 
     mkdir -p /root/.ssh
diff --git a/pkgs/build-worker-oci/entrypoint.sh b/pkgs/build-worker-oci/entrypoint.sh
index b4035f2..541bd13 100644
--- a/pkgs/build-worker-oci/entrypoint.sh
+++ b/pkgs/build-worker-oci/entrypoint.sh
@@ -16,13 +16,14 @@ fi
 
 [[ ! -d "/mnt/data/nix-store" ]] && mkdir -p /mnt/data/nix-store
 [[ ! -d "/mnt/data/workdir" ]] && mkdir -p /mnt/data/workdir
+[[ ! -d "/mnt/data/tmp" ]] && mkdir -p /mnt/data/tmp
+
 rm -rf /mnt/data/nix-store/*
 
 rm -f /etc/nix/nix.conf
 cp /root/nix.conf /etc/nix/nix.conf
 
-/bin/mount -t overlay overlay -o lowerdir=/nix/store,upperdir=/mnt/data/nix-store,workdir=/mnt/data/workdir /nix/store
-
-#nix-store --gc --max-freed 1T
+/bin/mount -t overlay overlay -o lowerdir=/nix,upperdir=/mnt/data/nix-store,workdir=/mnt/data/workdir /nix
+/bin/mount --bind /mnt/data/tmp /tmp
 
 /root/.nix-profile/bin/sshd -D -f /root/sshd_config