diff --git a/flake.lock b/flake.lock
index cd3f50c..55d50b0 100644
--- a/flake.lock
+++ b/flake.lock
@@ -150,6 +150,22 @@
         "type": "github"
       }
     },
+    "impermanence": {
+      "locked": {
+        "lastModified": 1697303681,
+        "narHash": "sha256-caJ0rXeagaih+xTgRduYtYKL1rZ9ylh06CIrt1w5B4g=",
+        "owner": "nix-community",
+        "repo": "impermanence",
+        "rev": "0f317c2e9e56550ce12323eb39302d251618f5b5",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "ref": "master",
+        "repo": "impermanence",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1732521221,
@@ -214,6 +230,7 @@
         "flake-parts": "flake-parts",
         "futils": "futils",
         "home-manager": "home-manager",
+        "impermanence": "impermanence",
         "nixpkgs": "nixpkgs",
         "nur": "nur",
         "pre-commit-hooks": "pre-commit-hooks",
diff --git a/flake.nix b/flake.nix
index a07ee15..5a5b0ef 100644
--- a/flake.nix
+++ b/flake.nix
@@ -43,6 +43,13 @@
       };
     };
 
+    impermanence = {
+      type = "github";
+      owner = "nix-community";
+      repo = "impermanence";
+      ref = "master";
+    };
+
     nixpkgs = {
       type = "github";
       owner = "NixOS";
diff --git a/modules/home/tmux/default.nix b/modules/home/tmux/default.nix
index 23dff05..ca99fdc 100644
--- a/modules/home/tmux/default.nix
+++ b/modules/home/tmux/default.nix
@@ -84,6 +84,10 @@ in
       # Refresh configuration
       bind-key -N "Source tmux.conf" R source-file ${config.xdg.configHome}/tmux/tmux.conf \; display-message "Sourced tmux.conf!"
 
+      # Accept sloppy Ctrl key when switching windows, on top of default mapping
+      bind-key -N "Select the previous window" C-p previous-window
+      bind-key -N "Select the next window" C-n next -window
+
       # Better vim mode
       bind-key -T copy-mode-vi 'v' send -X begin-selection
       ${
diff --git a/modules/nixos/hardware/bluetooth/default.nix b/modules/nixos/hardware/bluetooth/default.nix
index e9b1991..efce5c4 100644
--- a/modules/nixos/hardware/bluetooth/default.nix
+++ b/modules/nixos/hardware/bluetooth/default.nix
@@ -18,6 +18,13 @@ in
       services.blueman.enable = true;
     }
 
+    # Persist bluetooth files
+    {
+      my.system.persist.directories = [
+        "/var/lib/bluetooth"
+      ];
+    }
+
     # Support for additional bluetooth codecs
     (lib.mkIf cfg.loadExtraCodecs {
       hardware.pulseaudio = {
diff --git a/modules/nixos/hardware/networking/default.nix b/modules/nixos/hardware/networking/default.nix
index f0806fe..9e85966 100644
--- a/modules/nixos/hardware/networking/default.nix
+++ b/modules/nixos/hardware/networking/default.nix
@@ -22,6 +22,18 @@ in
   config = lib.mkMerge [
     (lib.mkIf cfg.wireless.enable {
       networking.networkmanager.enable = true;
+
+      # IWD needs persistence if enabled
+
+      # Persist NetworkManager files
+      my.system.persist.files = [
+        "/var/lib/NetworkManager/secret_key"
+        "/var/lib/NetworkManager/seen-bssids"
+        "/var/lib/NetworkManager/timestamps"
+      ];
+      my.system.persist.directories = [
+        "/etc/NetworkManager/system-connections"
+      ];
     })
   ];
 }
diff --git a/modules/nixos/services/aria/default.nix b/modules/nixos/services/aria/default.nix
index acbf0b7..be35909 100644
--- a/modules/nixos/services/aria/default.nix
+++ b/modules/nixos/services/aria/default.nix
@@ -69,6 +69,11 @@ in
       };
     };
 
+    my.system.persist.directories = [
+      cfg.downloadDir
+      "/var/lib/aria2"
+    ];
+
     # NOTE: unfortunately aria2 does not log connection failures for fail2ban
   };
 }
diff --git a/modules/nixos/services/audiobookshelf/default.nix b/modules/nixos/services/audiobookshelf/default.nix
index 04ec8b9..5e79990 100644
--- a/modules/nixos/services/audiobookshelf/default.nix
+++ b/modules/nixos/services/audiobookshelf/default.nix
@@ -34,6 +34,10 @@ in
       };
     };
 
+    my.system.persist.directories = [
+      "/var/lib/${config.services.audiobookshelf.dataDir}"
+    ];
+
     services.fail2ban.jails = {
       audiobookshelf = ''
         enabled = true
diff --git a/modules/nixos/services/blog/default.nix b/modules/nixos/services/blog/default.nix
index e4d2d42..aadc4f0 100644
--- a/modules/nixos/services/blog/default.nix
+++ b/modules/nixos/services/blog/default.nix
@@ -41,5 +41,12 @@ in
 
     # Those are all subdomains, no problem
     my.services.nginx.virtualHosts = hostsInfo;
+
+    my.system.persist.directories = [
+      "/var/www/blog"
+      "/var/www/cv"
+      "/var/www/dev"
+      "/var/www/key"
+    ];
   };
 }
diff --git a/modules/nixos/services/calibre-web/default.nix b/modules/nixos/services/calibre-web/default.nix
index b7bf9df..8a8af33 100644
--- a/modules/nixos/services/calibre-web/default.nix
+++ b/modules/nixos/services/calibre-web/default.nix
@@ -53,6 +53,11 @@ in
       ];
     };
 
+    my.system.persist.directories = [
+      "/var/lib/${config.services.calibre-web.dataDir}"
+      cfg.libraryPath
+    ];
+
     services.fail2ban.jails = {
       calibre-web = ''
         enabled = true
diff --git a/modules/nixos/services/drone/runner-docker/default.nix b/modules/nixos/services/drone/runner-docker/default.nix
index e53c608..1db263b 100644
--- a/modules/nixos/services/drone/runner-docker/default.nix
+++ b/modules/nixos/services/drone/runner-docker/default.nix
@@ -39,5 +39,7 @@ in
       extraGroups = [ "docker" ]; # Give access to the daemon
     };
     users.groups.drone-runner-docker = { };
+
+    # FIXME: persistence?
   };
 }
diff --git a/modules/nixos/services/drone/runner-exec/default.nix b/modules/nixos/services/drone/runner-exec/default.nix
index a9bb563..c30a1a2 100644
--- a/modules/nixos/services/drone/runner-exec/default.nix
+++ b/modules/nixos/services/drone/runner-exec/default.nix
@@ -63,5 +63,7 @@ in
       group = "drone-runner-exec";
     };
     users.groups.drone-runner-exec = { };
+
+    # FIXME: persistence?
   };
 }
diff --git a/modules/nixos/services/drone/server/default.nix b/modules/nixos/services/drone/server/default.nix
index a3a1e49..b5d5df7 100644
--- a/modules/nixos/services/drone/server/default.nix
+++ b/modules/nixos/services/drone/server/default.nix
@@ -50,5 +50,7 @@ in
         inherit (cfg) port;
       };
     };
+
+    # FIXME: persistence?
   };
 }
diff --git a/modules/nixos/services/fail2ban/default.nix b/modules/nixos/services/fail2ban/default.nix
index be5f7da..8dcc80d 100644
--- a/modules/nixos/services/fail2ban/default.nix
+++ b/modules/nixos/services/fail2ban/default.nix
@@ -33,5 +33,9 @@ in
         bantime = "10m";
       };
     };
+
+    my.system.persist.directories = [
+      "/var/lib/fail2ban"
+    ];
   };
 }
diff --git a/modules/nixos/services/flood/default.nix b/modules/nixos/services/flood/default.nix
index f3fe90b..b129617 100644
--- a/modules/nixos/services/flood/default.nix
+++ b/modules/nixos/services/flood/default.nix
@@ -28,6 +28,10 @@ in
       };
     };
 
+    my.system.persist.directories = [
+      "/var/lib/flood"
+    ];
+
     # NOTE: unfortunately flood does not log connection failures for fail2ban
   };
 }
diff --git a/modules/nixos/services/forgejo/default.nix b/modules/nixos/services/forgejo/default.nix
index 511724b..b7cc0c5 100644
--- a/modules/nixos/services/forgejo/default.nix
+++ b/modules/nixos/services/forgejo/default.nix
@@ -147,6 +147,11 @@ in
       ];
     };
 
+    my.system.persist.directories = [
+      config.services.forgejo.lfs.contentDir
+      config.services.forgejo.repositoryRoot
+    ];
+
     services.fail2ban.jails = {
       forgejo = ''
         enabled = true
diff --git a/modules/nixos/services/gitea/default.nix b/modules/nixos/services/gitea/default.nix
index 95bdf42..76de5dd 100644
--- a/modules/nixos/services/gitea/default.nix
+++ b/modules/nixos/services/gitea/default.nix
@@ -131,6 +131,11 @@ in
       ];
     };
 
+    my.system.persist.directories = [
+      config.services.gitea.lfs.contentDir
+      config.services.gitea.repositoryRoot
+    ];
+
     services.fail2ban.jails = {
       gitea = ''
         enabled = true
diff --git a/modules/nixos/services/grocy/default.nix b/modules/nixos/services/grocy/default.nix
index 9045b03..57295f1 100644
--- a/modules/nixos/services/grocy/default.nix
+++ b/modules/nixos/services/grocy/default.nix
@@ -37,6 +37,16 @@ in
       useACMEHost = config.networking.domain;
     };
 
+    my.services.backup = {
+      paths = [
+        config.services.grocy.dataDir
+      ];
+    };
+
+    my.system.persist.directories = [
+      config.services.grocy.dataDir
+    ];
+
     # NOTE: unfortunately grocy does not log connection failures for fail2ban
   };
 }
diff --git a/modules/nixos/services/indexers/default.nix b/modules/nixos/services/indexers/default.nix
index 8a42345..58f845d 100644
--- a/modules/nixos/services/indexers/default.nix
+++ b/modules/nixos/services/indexers/default.nix
@@ -33,6 +33,10 @@ in
           port = jackettPort;
         };
       };
+
+      my.system.persist.directories = [
+        config.services.jackett.dataDir
+      ];
     })
 
     (lib.mkIf cfg.nzbhydra.enable {
@@ -45,6 +49,10 @@ in
           port = nzbhydraPort;
         };
       };
+
+      my.system.persist.directories = [
+        config.services.nzbhydra2.dataDir
+      ];
     })
 
     (lib.mkIf cfg.prowlarr.enable {
@@ -58,6 +66,10 @@ in
         };
       };
 
+      my.system.persist.directories = [
+        "/var/lib/prowlarr"
+      ];
+
       services.fail2ban.jails = {
         prowlarr = ''
           enabled = true
diff --git a/modules/nixos/services/jellyfin/default.nix b/modules/nixos/services/jellyfin/default.nix
index 6edeb67..3a421ec 100644
--- a/modules/nixos/services/jellyfin/default.nix
+++ b/modules/nixos/services/jellyfin/default.nix
@@ -38,6 +38,10 @@ in
       };
     };
 
+    my.system.persist.directories = [
+      "/var/lib/jellyfin"
+    ];
+
     services.fail2ban.jails = {
       jellyfin = ''
         enabled = true
diff --git a/modules/nixos/services/komga/default.nix b/modules/nixos/services/komga/default.nix
index e1dc780..15e4fbb 100644
--- a/modules/nixos/services/komga/default.nix
+++ b/modules/nixos/services/komga/default.nix
@@ -36,6 +36,10 @@ in
       };
     };
 
+    my.system.persist.directories = [
+      config.services.komga.stateDir
+    ];
+
     services.fail2ban.jails = {
       komga = ''
         enabled = true
diff --git a/modules/nixos/services/lohr/default.nix b/modules/nixos/services/lohr/default.nix
index 21ed93b..c69075f 100644
--- a/modules/nixos/services/lohr/default.nix
+++ b/modules/nixos/services/lohr/default.nix
@@ -107,5 +107,9 @@ in
         };
       };
     };
+
+    my.system.persist.directories = [
+      "/var/lib/lohr"
+    ];
   };
 }
diff --git a/modules/nixos/services/matrix/default.nix b/modules/nixos/services/matrix/default.nix
index f423834..cb41a0f 100644
--- a/modules/nixos/services/matrix/default.nix
+++ b/modules/nixos/services/matrix/default.nix
@@ -214,5 +214,9 @@ in
         config.services.matrix-synapse.dataDir
       ];
     };
+
+    my.system.persist.directories = [
+      config.services.matrix-synapse.dataDir
+    ];
   };
 }
diff --git a/modules/nixos/services/mealie/default.nix b/modules/nixos/services/mealie/default.nix
index 664d5ba..630231f 100644
--- a/modules/nixos/services/mealie/default.nix
+++ b/modules/nixos/services/mealie/default.nix
@@ -72,6 +72,12 @@ in
       };
     };
 
+    my.services.backup = {
+      paths = [
+        "/var/lib/mealie"
+      ];
+    };
+
     services.fail2ban.jails = {
       mealie = ''
         enabled = true
diff --git a/modules/nixos/services/monitoring/default.nix b/modules/nixos/services/monitoring/default.nix
index 49919c1..4415cb5 100644
--- a/modules/nixos/services/monitoring/default.nix
+++ b/modules/nixos/services/monitoring/default.nix
@@ -130,5 +130,10 @@ in
         inherit (cfg.grafana) port;
       };
     };
+
+    my.system.persist.directories = [
+      config.services.grafana.dataDir
+      "/var/lib/${config.services.prometheus.stateDir}"
+    ];
   };
 }
diff --git a/modules/nixos/services/navidrome/default.nix b/modules/nixos/services/navidrome/default.nix
index c513b91..0fc3539 100644
--- a/modules/nixos/services/navidrome/default.nix
+++ b/modules/nixos/services/navidrome/default.nix
@@ -53,6 +53,10 @@ in
       };
     };
 
+    my.system.persist.directories = [
+      "/var/lib/navidrome"
+    ];
+
     services.fail2ban.jails = {
       navidrome = ''
         enabled = true
diff --git a/modules/nixos/services/nextcloud/collabora.nix b/modules/nixos/services/nextcloud/collabora.nix
index f8f42a7..dce1a99 100644
--- a/modules/nixos/services/nextcloud/collabora.nix
+++ b/modules/nixos/services/nextcloud/collabora.nix
@@ -46,5 +46,7 @@ in
         ];
       };
     };
+
+    # FIXME: persistence?
   };
 }
diff --git a/modules/nixos/services/nextcloud/default.nix b/modules/nixos/services/nextcloud/default.nix
index fe94177..5452dac 100644
--- a/modules/nixos/services/nextcloud/default.nix
+++ b/modules/nixos/services/nextcloud/default.nix
@@ -92,6 +92,10 @@ in
       ];
     };
 
+    my.system.persist.directories = [
+      config.services.nextcloud.home
+    ];
+
     services.fail2ban.jails = {
       nextcloud = ''
         enabled = true
diff --git a/modules/nixos/services/nginx/default.nix b/modules/nixos/services/nginx/default.nix
index 3bba9f4..ab69efd 100644
--- a/modules/nixos/services/nginx/default.nix
+++ b/modules/nixos/services/nginx/default.nix
@@ -486,5 +486,9 @@ in
         }
       ];
     };
+
+    my.system.persist.directories = [
+      "/var/lib/acme"
+    ];
   };
 }
diff --git a/modules/nixos/services/paperless/default.nix b/modules/nixos/services/paperless/default.nix
index c8967e1..0754721 100644
--- a/modules/nixos/services/paperless/default.nix
+++ b/modules/nixos/services/paperless/default.nix
@@ -146,5 +146,10 @@ in
         config.services.paperless.mediaDir
       ];
     };
+
+    my.system.persist.directories = [
+      config.services.paperless.dataDir
+      config.services.paperless.mediaDir
+    ];
   };
 }
diff --git a/modules/nixos/services/pdf-edit/default.nix b/modules/nixos/services/pdf-edit/default.nix
index d59507b..180e520 100644
--- a/modules/nixos/services/pdf-edit/default.nix
+++ b/modules/nixos/services/pdf-edit/default.nix
@@ -54,6 +54,10 @@ in
       };
     };
 
+    my.system.persist.directories = [
+      "/var/lib/stirling-pdf"
+    ];
+
     services.fail2ban.jails = {
       stirling-pdf = ''
         enabled = true
diff --git a/modules/nixos/services/podgrab/default.nix b/modules/nixos/services/podgrab/default.nix
index 3ced8d3..ec6ecb2 100644
--- a/modules/nixos/services/podgrab/default.nix
+++ b/modules/nixos/services/podgrab/default.nix
@@ -51,5 +51,10 @@ in
         inherit (cfg) port;
       };
     };
+
+    my.system.persist.directories = [
+      config.systemd.services.podgrab.environment.CONFIG
+      config.systemd.services.podgrab.environment.DATA
+    ];
   };
 }
diff --git a/modules/nixos/services/postgresql-backup/default.nix b/modules/nixos/services/postgresql-backup/default.nix
index dff5494..3d6c03b 100644
--- a/modules/nixos/services/postgresql-backup/default.nix
+++ b/modules/nixos/services/postgresql-backup/default.nix
@@ -24,5 +24,9 @@ in
         (config.services.postgresqlBackup.location + "/*.prev.sql.gz")
       ];
     };
+
+    my.system.persist.directories = [
+      config.services.postgresqlBackup.location
+    ];
   };
 }
diff --git a/modules/nixos/services/postgresql/default.nix b/modules/nixos/services/postgresql/default.nix
index bbe46d4..cea4c88 100644
--- a/modules/nixos/services/postgresql/default.nix
+++ b/modules/nixos/services/postgresql/default.nix
@@ -18,6 +18,13 @@ in
       };
     })
 
+    # Only persist directory if the actual service is enabled
+    (lib.mkIf config.services.postgresql.enable {
+      my.system.persist.directories = [
+        config.services.postgresql.dataDir
+      ];
+    })
+
     # Taken from the manual
     (lib.mkIf cfg.upgradeScript {
       environment.systemPackages =
diff --git a/modules/nixos/services/pyload/default.nix b/modules/nixos/services/pyload/default.nix
index 7257d0f..ec5042b 100644
--- a/modules/nixos/services/pyload/default.nix
+++ b/modules/nixos/services/pyload/default.nix
@@ -53,6 +53,11 @@ in
       };
     };
 
+    my.system.persist.directories = [
+      cfg.downloadDirectory
+      "/var/lib/pyload"
+    ];
+
     services.fail2ban.jails = {
       pyload = ''
         enabled = true
diff --git a/modules/nixos/services/quassel/default.nix b/modules/nixos/services/quassel/default.nix
index 695f9e0..0065195 100644
--- a/modules/nixos/services/quassel/default.nix
+++ b/modules/nixos/services/quassel/default.nix
@@ -46,5 +46,9 @@ in
       # Because Quassel does not use the socket, I simply trust its connection
       authentication = "host quassel quassel localhost trust";
     };
+
+    my.system.persist.directories = [
+      config.services.quassel.dataDir
+    ];
   };
 }
diff --git a/modules/nixos/services/rss-bridge/default.nix b/modules/nixos/services/rss-bridge/default.nix
index 52b1030..977b431 100644
--- a/modules/nixos/services/rss-bridge/default.nix
+++ b/modules/nixos/services/rss-bridge/default.nix
@@ -22,5 +22,9 @@ in
       forceSSL = true;
       useACMEHost = config.networking.domain;
     };
+
+    my.system.persist.directories = [
+      config.services.rss-bridge.dataDir
+    ];
   };
 }
diff --git a/modules/nixos/services/sabnzbd/default.nix b/modules/nixos/services/sabnzbd/default.nix
index 9e0d9c3..86202ab 100644
--- a/modules/nixos/services/sabnzbd/default.nix
+++ b/modules/nixos/services/sabnzbd/default.nix
@@ -24,6 +24,10 @@ in
       };
     };
 
+    my.system.persist.files = [
+      config.services.sabnzbd.configFile
+    ];
+
     services.fail2ban.jails = {
       sabnzbd = ''
         enabled = true
diff --git a/modules/nixos/services/servarr/default.nix b/modules/nixos/services/servarr/default.nix
index e25d9cf..c0f57df 100644
--- a/modules/nixos/services/servarr/default.nix
+++ b/modules/nixos/services/servarr/default.nix
@@ -19,6 +19,16 @@ let
       enable = true;
       group = "media";
     };
+
+    my.system.persist.directories =
+      let
+        # Bazarr breaks the mold unfortunately
+        dataDir =
+          if service != "bazarr"
+          then config.services.${service}.dataDir
+          else "/var/lib/bazarr";
+      in
+      [ dataDir ];
   };
 
   mkRedirection = service: {
diff --git a/modules/nixos/services/ssh-server/default.nix b/modules/nixos/services/ssh-server/default.nix
index 9ae0fa8..c4d1fd6 100644
--- a/modules/nixos/services/ssh-server/default.nix
+++ b/modules/nixos/services/ssh-server/default.nix
@@ -20,6 +20,13 @@ in
       };
     };
 
+    # Persist SSH keys
+    my.system.persist.files =
+      let
+        pubAndPrivKey = key: [ key.path "${key.path}.pub" ];
+      in
+      lib.concatMap pubAndPrivKey config.services.openssh.hostKeys;
+
     # Opens the relevant UDP ports.
     programs.mosh.enable = true;
   };
diff --git a/modules/nixos/services/tandoor-recipes/default.nix b/modules/nixos/services/tandoor-recipes/default.nix
index 3447bee..0bfa9fe 100644
--- a/modules/nixos/services/tandoor-recipes/default.nix
+++ b/modules/nixos/services/tandoor-recipes/default.nix
@@ -83,6 +83,16 @@ in
       };
     };
 
+    my.services.backup = {
+      paths = [
+        "/var/lib/tandoor-recipes"
+      ];
+    };
+
+    my.system.persist.directories = [
+      "/var/lib/tandoor-recipes"
+    ];
+
     # NOTE: unfortunately tandoor-recipes does not log connection failures for fail2ban
   };
 }
diff --git a/modules/nixos/services/transmission/default.nix b/modules/nixos/services/transmission/default.nix
index ac8b24d..a5393eb 100644
--- a/modules/nixos/services/transmission/default.nix
+++ b/modules/nixos/services/transmission/default.nix
@@ -91,6 +91,11 @@ in
       allowedUDPPorts = [ cfg.peerPort ];
     };
 
+    my.system.persist.directories = [
+      cfg.downloadBase
+      config.services.transmission.home
+    ];
+
     # NOTE: unfortunately transmission does not log connection failures for fail2ban
   };
 }
diff --git a/modules/nixos/services/vikunja/default.nix b/modules/nixos/services/vikunja/default.nix
index 2753da3..d902449 100644
--- a/modules/nixos/services/vikunja/default.nix
+++ b/modules/nixos/services/vikunja/default.nix
@@ -100,6 +100,10 @@ in
       ];
     };
 
+    my.system.persist.directories = [
+      config.services.vikunja.settings.files.basepath
+    ];
+
     # NOTE: unfortunately vikunja does not log connection failures for fail2ban
   };
 }
diff --git a/modules/nixos/services/woodpecker/agent-docker/default.nix b/modules/nixos/services/woodpecker/agent-docker/default.nix
index 79d3299..2e74b67 100644
--- a/modules/nixos/services/woodpecker/agent-docker/default.nix
+++ b/modules/nixos/services/woodpecker/agent-docker/default.nix
@@ -38,5 +38,7 @@ in
         ];
       };
     };
+
+    # FIXME: persistence?
   };
 }
diff --git a/modules/nixos/services/woodpecker/agent-exec/default.nix b/modules/nixos/services/woodpecker/agent-exec/default.nix
index 24161b0..4210242 100644
--- a/modules/nixos/services/woodpecker/agent-exec/default.nix
+++ b/modules/nixos/services/woodpecker/agent-exec/default.nix
@@ -62,5 +62,7 @@ in
         ];
       };
     };
+
+    # FIXME: persistence?
   };
 }
diff --git a/modules/nixos/services/woodpecker/server/default.nix b/modules/nixos/services/woodpecker/server/default.nix
index adf533e..5d25284 100644
--- a/modules/nixos/services/woodpecker/server/default.nix
+++ b/modules/nixos/services/woodpecker/server/default.nix
@@ -61,5 +61,7 @@ in
         port = cfg.rpcPort;
       };
     };
+
+    # FIXME: persistence
   };
 }
diff --git a/modules/nixos/system/default.nix b/modules/nixos/system/default.nix
index e6fb25b..3531847 100644
--- a/modules/nixos/system/default.nix
+++ b/modules/nixos/system/default.nix
@@ -9,6 +9,7 @@
     ./language
     ./nix
     ./packages
+    ./persist
     ./podman
     ./polkit
     ./printing
diff --git a/modules/nixos/system/docker/default.nix b/modules/nixos/system/docker/default.nix
index f051814..cab9fb5 100644
--- a/modules/nixos/system/docker/default.nix
+++ b/modules/nixos/system/docker/default.nix
@@ -23,5 +23,9 @@ in
         ];
       };
     };
+
+    my.system.persist.directories = [
+      "/var/lib/docker"
+    ];
   };
 }
diff --git a/modules/nixos/system/packages/default.nix b/modules/nixos/system/packages/default.nix
index ebea06f..6a78ff6 100644
--- a/modules/nixos/system/packages/default.nix
+++ b/modules/nixos/system/packages/default.nix
@@ -1,5 +1,5 @@
 # Common packages
-{ config, lib, pkgs, ... }:
+{ config, lib, ... }:
 let
   cfg = config.my.system.packages;
 in
@@ -13,10 +13,6 @@ in
   };
 
   config = lib.mkIf cfg.enable {
-    environment.systemPackages = with pkgs; [
-      wget
-    ];
-
     programs = {
       vim = {
         enable = true;
diff --git a/modules/nixos/system/persist/default.nix b/modules/nixos/system/persist/default.nix
new file mode 100644
index 0000000..ac1820e
--- /dev/null
+++ b/modules/nixos/system/persist/default.nix
@@ -0,0 +1,71 @@
+# Ephemeral root configuration
+{ config, inputs, lib, ... }:
+let
+  cfg = config.my.system.persist;
+in
+{
+  imports = [
+    inputs.impermanence.nixosModules.impermanence
+  ];
+
+  options.my.system.persist = with lib; {
+    enable = mkEnableOption "stateless system configuration";
+
+    mountPoint = lib.mkOption {
+      type = types.str;
+      default = "/persistent";
+      example = "/etc/nix/persist";
+      description = ''
+        Which mount point should be used to persist this system's files and
+        directories.
+      '';
+    };
+
+    files = lib.mkOption {
+      type = with types; listOf str;
+      default = [ ];
+      example = [
+        "/etc/nix/id_rsa"
+      ];
+      description = ''
+        Additional files in the root to link to persistent storage.
+      '';
+    };
+
+    directories = lib.mkOption {
+      type = with types; listOf str;
+      default = [ ];
+      example = [
+        "/var/lib/libvirt"
+      ];
+      description = ''
+        Additional directories in the root to link to persistent storage.
+      '';
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    environment.persistence."${cfg.mountPoint}" = {
+      files = [
+        "/etc/machine-id"
+        "/etc/adjtime"
+        "/var/lib/systemd/timesync/clock"
+      ]
+      ++ lib.unique cfg.files
+      ;
+
+      directories = [
+        "/etc/nixos" # In case it's storage directory of our configuration
+        "/var/log"
+        "/var/lib/nixos" # UID/GID maps
+        "/var/lib/systemd/coredump"
+
+        "/var/lib/systemd" # FIXME: needed?
+        "/var/spool" # FIXME: needed?
+        "/var/tmp" # FIXME: needed?
+      ]
+      ++ lib.unique cfg.directories
+      ;
+    };
+  };
+}
diff --git a/modules/nixos/system/podman/default.nix b/modules/nixos/system/podman/default.nix
index 52630c7..8400dfd 100644
--- a/modules/nixos/system/podman/default.nix
+++ b/modules/nixos/system/podman/default.nix
@@ -44,5 +44,9 @@ in
         ];
       };
     };
+
+    my.system.persist.directories = [
+      "/var/lib/containers"
+    ];
   };
 }
diff --git a/modules/nixos/system/printing/default.nix b/modules/nixos/system/printing/default.nix
index 0dfab0f..3e21b25 100644
--- a/modules/nixos/system/printing/default.nix
+++ b/modules/nixos/system/printing/default.nix
@@ -65,5 +65,7 @@ in
       # Allow resolution of '.local' addresses
       nssmdns4 = true;
     };
+
+    # FIXME: persistence?
   };
 }