diff --git a/configurations.nix b/configurations.nix
index 5c77292..6645be4 100644
--- a/configurations.nix
+++ b/configurations.nix
@@ -8,6 +8,7 @@ let
     nur
     colmena
     flake-registry
+    nixos-hypervisor
     nixos-hardware
     nixpkgs-unstable
     srvos
@@ -44,6 +45,8 @@ let
     srvos.nixosModules.mixins-trusted-nix-caches
     srvos.nixosModules.mixins-terminfo
 
+    nixos-hypervisor.nixosModules.host
+
     # srvos.nixosModules.mixins-telegraf
     # srvos.nixosModules.mixins-terminfo
 
@@ -105,6 +108,9 @@ in
   flake.colmena = {
     meta.nixpkgs = import nixpkgs {
       system = "x86_64-linux";
+      overlays = [
+        nixos-hypervisor.overlays.default
+      ];
     };
     epyc = {
       imports =
diff --git a/flake.lock b/flake.lock
index 0c1856a..c5de10c 100644
--- a/flake.lock
+++ b/flake.lock
@@ -183,6 +183,27 @@
         "type": "github"
       }
     },
+    "flake-parts_2": {
+      "inputs": {
+        "nixpkgs-lib": [
+          "nixos-hypervisor",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1687762428,
+        "narHash": "sha256-DIf7mi45PKo+s8dOYF+UlXHzE0Wl/+k3tXUyAoAnoGE=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "37dd7bb15791c86d55c5121740a1887ab55ee836",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
     "flake-registry": {
       "flake": false,
       "locked": {
@@ -286,6 +307,29 @@
         "type": "github"
       }
     },
+    "nixos-hypervisor": {
+      "inputs": {
+        "flake-parts": "flake-parts_2",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "treefmt-nix": "treefmt-nix"
+      },
+      "locked": {
+        "lastModified": 1688428885,
+        "narHash": "sha256-fVIbXKvHmxSUAKTMiXx799UasQwU2XT+op7bzvtfl8c=",
+        "ref": "main",
+        "rev": "9f32a304708fd9c91c081db05eee1b4f2e0226cc",
+        "revCount": 2,
+        "type": "git",
+        "url": "ssh://gitea@git.newtype.fr/newtype/nixos-hypervisor"
+      },
+      "original": {
+        "ref": "main",
+        "type": "git",
+        "url": "ssh://gitea@git.newtype.fr/newtype/nixos-hypervisor"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1702539185,
@@ -336,16 +380,16 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1716155578,
-        "narHash": "sha256-+ocwkKmur5q8MJpm8ao0O2wdbMYBxPtFDrCvjqnkZYA=",
-        "owner": "pennae",
+        "lastModified": 1709428628,
+        "narHash": "sha256-//ZCCnpVai/ShtO2vPjh3AWgo8riXCaret6V9s7Hew4=",
+        "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "093d16ae7a4c6b5f215152972a223b9fbcd3343a",
+        "rev": "66d65cb00b82ffa04ee03347595aa20e41fe3555",
         "type": "github"
       },
       "original": {
-        "owner": "pennae",
-        "ref": "stdenv-jobserver",
+        "owner": "NixOS",
+        "ref": "release-23.11",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -375,6 +419,7 @@
         "flake-registry": "flake-registry",
         "home-manager": "home-manager_2",
         "nixos-hardware": "nixos-hardware",
+        "nixos-hypervisor": "nixos-hypervisor",
         "nixpkgs": "nixpkgs_2",
         "nixpkgs-unstable": "nixpkgs-unstable",
         "nur": "nur",
@@ -431,6 +476,27 @@
         "repo": "default",
         "type": "github"
       }
+    },
+    "treefmt-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixos-hypervisor",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1688026376,
+        "narHash": "sha256-qJmkr9BWDpqblk4E9/rCsAEl39y2n4Ycw6KRopvpUcY=",
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "rev": "df3f32b0cc253dfc7009b7317e8f0e7ccd70b1cf",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "type": "github"
+      }
     }
   },
   "root": "root",
diff --git a/flake.nix b/flake.nix
index c52f6dd..88aaf19 100644
--- a/flake.nix
+++ b/flake.nix
@@ -10,7 +10,7 @@
     flake-parts.url = "github:hercules-ci/flake-parts";
     flake-parts.inputs.nixpkgs-lib.follows = "nixpkgs";
 
-    nixpkgs.url = "github:pennae/nixpkgs/stdenv-jobserver";
+    nixpkgs.url = "github:NixOS/nixpkgs/release-23.11";
     nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
 
     nixos-hardware.url = "github:NixOS/nixos-hardware";
@@ -33,8 +33,8 @@
 
     # Ryan's experimental hypervisor based on cloud-hypervisor
     # Private repository, you need a valid SSH key to access it
-    # nixos-hypervisor.url = "git+ssh://gitea@git.newtype.fr/newtype/nixos-hypervisor?ref=main";
-    # nixos-hypervisor.inputs.nixpkgs.follows = "nixpkgs";
+    nixos-hypervisor.url = "git+ssh://gitea@git.newtype.fr/newtype/nixos-hypervisor?ref=main";
+    nixos-hypervisor.inputs.nixpkgs.follows = "nixpkgs";
 
     flake-registry.url = "github:NixOS/flake-registry";
     flake-registry.flake = false;
diff --git a/hosts/epyc.nix b/hosts/epyc.nix
index f84a8f4..0e27c41 100644
--- a/hosts/epyc.nix
+++ b/hosts/epyc.nix
@@ -36,6 +36,14 @@ in
   '';
   networking.firewall.allowedTCPPorts = [ 5432 ];
 
+  virtualisation.nvisor.vms = {
+    vm01 = {
+      config = { pkgs, ... }: {
+        environment.systemPackages = [ pkgs.hello ];
+      };
+    };
+  };
+
   nix.buildMachines = [
     { hostName = "localhost";
       systems = [
diff --git a/modules/hypervisor.nix b/modules/hypervisor.nix
index 4b2c5c4..2b11b5c 100644
--- a/modules/hypervisor.nix
+++ b/modules/hypervisor.nix
@@ -1,2 +1,5 @@
 { ... }: {
+  virtualisation.nvisor = {
+    enable = true;
+  };
 }
diff --git a/modules/nix-daemon.nix b/modules/nix-daemon.nix
index b30d12d..9ebbe82 100644
--- a/modules/nix-daemon.nix
+++ b/modules/nix-daemon.nix
@@ -30,9 +30,6 @@ in
       { domain = "*"; item = "nofile"; type = "-"; value = "20480"; }
     ];
 
-    # Makes the computer go faster.
-    nixos.jobserver.enable = true;
-
     # Memory accounting techniques
     systemd.services.nix-daemon.serviceConfig = {
       MemoryAccounting = true;
@@ -66,7 +63,7 @@ in
         use-cgroups = true;
         http-connections = 0;
         auto-allocate-uids = true;
-        cores = 0;
+        cores = 64; # 128 is too much, it will explode the RAM for now. Let's keep it serious.
         max-jobs = 2; # Do not build more than 2 derivations at once in the event, both of them are too big, yes this is stupid, fix it in Nix.
         fsync-metadata = true;
         substituters = [