diff --git a/flake.nix b/flake.nix
index 600b12c..9c829c1 100644
--- a/flake.nix
+++ b/flake.nix
@@ -105,15 +105,6 @@
           ]
           ++ (nixpkgs.lib.attrValues self.nixosModules);
       in {
-        poseidon = nixpkgs.lib.nixosSystem rec {
-          inherit system;
-          modules =
-            [
-              ./poseidon.nix
-            ]
-            ++ sharedModules;
-        };
-
         hades = nixpkgs.lib.nixosSystem rec {
           inherit system;
           modules =
diff --git a/hosts/poseidon/default.nix b/hosts/poseidon/default.nix
deleted file mode 100644
index 83c7069..0000000
--- a/hosts/poseidon/default.nix
+++ /dev/null
@@ -1,84 +0,0 @@
-# Edit this configuration file to define what should be installed on
-# your system.  Help is available in the configuration.nix(5) man page
-# and in the NixOS manual (accessible by running ‘nixos-help’).
-{
-  config,
-  lib,
-  pkgs,
-  ...
-}: let
-  secrets = config.my.secrets;
-in {
-  imports = [
-    # Include the results of the hardware scan.
-    ./hardware-configuration.nix
-
-    ./home.nix
-    ./secrets.nix
-  ];
-
-  # Use the GRUB 2 boot loader.
-  boot.loader.grub.enable = true;
-  boot.loader.grub.device = "/dev/sda"; # or "nodev" for efi only
-
-  boot.supportedFilesystems = ["btrfs"];
-
-  services.btrfs = {
-    autoScrub = {
-      enable = true;
-      fileSystems = ["/"];
-    };
-  };
-
-  networking.hostName = "poseidon"; # Define your hostname.
-  networking.domain = "alarsyo.net";
-
-  # Set your time zone.
-  time.timeZone = "Europe/Paris";
-
-  # The global useDHCP flag is deprecated, therefore explicitly set to false here.
-  # Per-interface useDHCP will be mandatory in the future, so this generated config
-  # replicates the default behaviour.
-  networking.useDHCP = false;
-  networking.interfaces.eno1.ipv4.addresses = [
-    {
-      address = "163.172.11.110";
-      prefixLength = 24;
-    }
-  ];
-  networking.defaultGateway = {
-    address = "163.172.11.1";
-    interface = "eno1";
-  };
-  networking.nameservers = [
-    "62.210.16.6"
-    "62.210.16.7"
-  ];
-  my.networking.externalInterface = "eno1";
-
-  my.services = {
-    restic-backup = {
-      enable = true;
-      repo = "b2:poseidon-backup";
-      passwordFile = config.age.secrets."restic-backup/poseidon-password".path;
-      environmentFile = config.age.secrets."restic-backup/poseidon-credentials".path;
-    };
-
-    fail2ban = {
-      enable = true;
-    };
-
-    tailscale = {
-      enable = true;
-      exitNode = true;
-    };
-  };
-
-  services = {
-    openssh.enable = true;
-    vnstat.enable = true;
-  };
-
-  # Takes a long while to build
-  documentation.nixos.enable = false;
-}
diff --git a/hosts/poseidon/hardware-configuration.nix b/hosts/poseidon/hardware-configuration.nix
deleted file mode 100644
index fd1d735..0000000
--- a/hosts/poseidon/hardware-configuration.nix
+++ /dev/null
@@ -1,45 +0,0 @@
-# Do not modify this file!  It was generated by ‘nixos-generate-config’
-# and may be overwritten by future invocations.  Please make changes
-# to /etc/nixos/configuration.nix instead.
-{
-  config,
-  lib,
-  pkgs,
-  modulesPath,
-  ...
-}: let
-  inherit
-    (lib)
-    mkDefault
-    ;
-in {
-  imports = [
-    (modulesPath + "/installer/scan/not-detected.nix")
-  ];
-
-  boot.initrd.availableKernelModules = ["ahci" "usbhid"];
-  boot.initrd.kernelModules = [];
-  boot.kernelModules = ["kvm-intel"];
-  boot.extraModulePackages = [];
-
-  fileSystems."/" = {
-    device = "/dev/disk/by-uuid/adcf0158-edfb-402f-82e7-61e4902af989";
-    fsType = "btrfs";
-    options = [
-      "subvol=@nixos"
-      "compress=zstd"
-      "noatime"
-    ];
-  };
-
-  fileSystems."/boot" = {
-    device = "/dev/disk/by-uuid/ff54b622-0e26-4c6e-aa0c-ac2c1e12699a";
-    fsType = "ext4";
-  };
-
-  swapDevices = [
-    {device = "/dev/disk/by-uuid/381a9c5e-4d71-45b4-ac62-e7414b3768fc";}
-  ];
-
-  powerManagement.cpuFreqGovernor = mkDefault "ondemand";
-}
diff --git a/hosts/poseidon/home.nix b/hosts/poseidon/home.nix
deleted file mode 100644
index 3bb7dab..0000000
--- a/hosts/poseidon/home.nix
+++ /dev/null
@@ -1,5 +0,0 @@
-{config, ...}: {
-  home-manager.users.alarsyo = {
-    my.theme = config.home-manager.users.alarsyo.my.themes.solarizedLight;
-  };
-}
diff --git a/hosts/poseidon/secrets.nix b/hosts/poseidon/secrets.nix
deleted file mode 100644
index 238e7ea..0000000
--- a/hosts/poseidon/secrets.nix
+++ /dev/null
@@ -1,27 +0,0 @@
-{
-  config,
-  lib,
-  options,
-  ...
-}: {
-  config.age = {
-    secrets = let
-      toSecret = name: {...} @ attrs:
-        {
-          file = ./../../modules/secrets + "/${name}.age";
-        }
-        // attrs;
-    in
-      lib.mapAttrs toSecret {
-        "gandi/api-key" = {};
-
-        "lohr/shared-secret" = {};
-
-        "restic-backup/poseidon-credentials" = {};
-        "restic-backup/poseidon-password" = {};
-
-        "users/alarsyo-hashed-password" = {};
-        "users/root-hashed-password" = {};
-      };
-  };
-}
diff --git a/modules/secrets/secrets.nix b/modules/secrets/secrets.nix
index cb0cb5e..28760e7 100644
--- a/modules/secrets/secrets.nix
+++ b/modules/secrets/secrets.nix
@@ -5,13 +5,12 @@ let
   boreal = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIAagal1aqZh52wEmgsw7fkCzO41o4Cx+nV4wJGZuX1RP root@boreal";
   hades = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMxw8CtKUPAiPdKDEnuS7UyRrZN5BkUwsy5UPVF8V+lt root@hades";
   hephaestus = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIA7Cp+n5+huof68QlAoJV8bVf5h5p9kEZFAVpltWopdL root@hephaestus";
-  poseidon = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKYhZYMbWQG9TSQ2qze8GgFo2XrZzgu/GuSOGwenByJo root@poseidon";
 
-  machines = [boreal hades hephaestus poseidon];
+  machines = [boreal hades hephaestus];
 
   all = users ++ machines;
 in {
-  "gandi/api-key.age".publicKeys = [alarsyo hades poseidon];
+  "gandi/api-key.age".publicKeys = [alarsyo hades];
 
   "lohr/shared-secret.age".publicKeys = [alarsyo hades];
 
@@ -34,8 +33,6 @@ in {
   "restic-backup/hades-credentials.age".publicKeys = [alarsyo hades];
   "restic-backup/hephaestus-password.age".publicKeys = [alarsyo hephaestus];
   "restic-backup/hephaestus-credentials.age".publicKeys = [alarsyo hephaestus];
-  "restic-backup/poseidon-password.age".publicKeys = [alarsyo poseidon];
-  "restic-backup/poseidon-credentials.age".publicKeys = [alarsyo poseidon];
 
   "users/root-hashed-password.age".publicKeys = machines;
   "users/alarsyo-hashed-password.age".publicKeys = machines ++ [alarsyo];
diff --git a/poseidon.nix b/poseidon.nix
deleted file mode 100644
index ecb36c6..0000000
--- a/poseidon.nix
+++ /dev/null
@@ -1,23 +0,0 @@
-{...}: {
-  imports = [
-    # Default configuration
-    ./base
-
-    # Module definitions
-    ./modules
-
-    # Service definitions
-    ./services
-
-    # Host-specific config
-    ./hosts/poseidon
-  ];
-
-  # This value determines the NixOS release from which the default
-  # settings for stateful data, like file locations and database versions
-  # on your system were taken. It‘s perfectly fine and recommended to leave
-  # this value at the release version of the first install of this system.
-  # Before changing this value read the documentation for this option
-  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
-  system.stateVersion = "20.09"; # Did you read the comment?
-}