diff --git a/config/hosts/mastodon/mastodon.nix b/config/hosts/mastodon/mastodon.nix
index e7a3024..18c25e0 100644
--- a/config/hosts/mastodon/mastodon.nix
+++ b/config/hosts/mastodon/mastodon.nix
@@ -16,14 +16,14 @@ let
   };
   mastodonNekoverseOverlay = final: prev: {
     mastodon = (prev.mastodon.override rec {
-      version = "4.3.3";
+      version = "4.3.2";
       srcOverride = final.applyPatches {
         src = pkgs.stdenv.mkDerivation {
           name = "mastodonWithThemes";
           src = pkgs.fetchgit {
             url = "https://github.com/mastodon/mastodon.git";
             rev = "v${version}";
-            sha256 = "sha256-6FyLhRy+/uW+RYt+IRHpkTABjKGTQYjR/4GSPN+GlGY=";
+            sha256 = "sha256-A1sSUBtlztKFsZ3TY/c9CXFV8LhttRW2JmSU0QSVOIg=";
           };
           installPhase = ''
             cp -r ./ $out/
diff --git a/config/hosts/valkyrie/configuration.nix b/config/hosts/valkyrie/configuration.nix
index aca6e04..f4e2db5 100644
--- a/config/hosts/valkyrie/configuration.nix
+++ b/config/hosts/valkyrie/configuration.nix
@@ -96,5 +96,5 @@
 
   services.prometheus.exporters.node.enable = false;
 
-  system.stateVersion = "24.11";
+  system.stateVersion = "23.05";
 }
diff --git a/config/hosts/valkyrie/containers/uptime-kuma/default.nix b/config/hosts/valkyrie/containers/uptime-kuma/default.nix
index 7f55ea4..ca36384 100644
--- a/config/hosts/valkyrie/containers/uptime-kuma/default.nix
+++ b/config/hosts/valkyrie/containers/uptime-kuma/default.nix
@@ -1,6 +1,7 @@
-{ ... }:
+{ nixpkgs-unstable, ... }:
 {
   containers.uptime-kuma = {
+    nixpkgs = nixpkgs-unstable;
     autoStart = true;
     config = { ... }: {
       networking.useHostResolvConf = true;
diff --git a/flake.lock b/flake.lock
index cc86f81..f2eb41a 100644
--- a/flake.lock
+++ b/flake.lock
@@ -34,11 +34,11 @@
     },
     "nixlib": {
       "locked": {
-        "lastModified": 1736643958,
-        "narHash": "sha256-tmpqTSWVRJVhpvfSN9KXBvKEXplrwKnSZNAoNPf/S/s=",
+        "lastModified": 1734829460,
+        "narHash": "sha256-dPhc+f2wkmhMqMIfq+hColJdysgVxKP9ilZ5bR0NRZI=",
         "owner": "nix-community",
         "repo": "nixpkgs.lib",
-        "rev": "1418bc28a52126761c02dd3d89b2d8ca0f521181",
+        "rev": "0a31e8d833173ae63e43fd9dbff1ccf09c4f778c",
         "type": "github"
       },
       "original": {
@@ -55,11 +55,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1737057290,
-        "narHash": "sha256-3Pe0yKlCc7EOeq1X/aJVDH0CtNL+tIBm49vpepwL1MQ=",
+        "lastModified": 1734915500,
+        "narHash": "sha256-A7CTIQ8SW0hfbhKlwK+vSsu4pD+Oaelw3v6goX6go+U=",
         "owner": "nix-community",
         "repo": "nixos-generators",
-        "rev": "d002ce9b6e7eb467cd1c6bb9aef9c35d191b5453",
+        "rev": "051d1b2dda3b2e81b38d82e2b691e5c2f4d335f4",
         "type": "github"
       },
       "original": {
@@ -70,11 +70,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1737362405,
-        "narHash": "sha256-IT0B8bzp0JHYlMZ62qFdwKrj9zxdn3AEAsByXFWMcY4=",
+        "lastModified": 1736167739,
+        "narHash": "sha256-vL6dGj+0w+l1cK4duEokolgmx4Hu3O1TPjpD6Dfd7oY=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "6b90f6de986555ac39fc69c438d1192a397bf686",
+        "rev": "bd27be8c9381a66288504d5266db495de571d7bf",
         "type": "github"
       },
       "original": {
@@ -101,11 +101,11 @@
     },
     "nixpkgs-master": {
       "locked": {
-        "lastModified": 1737479843,
-        "narHash": "sha256-q8Na0pUQaVGyYRMq+M4VejamPtNfnmQC92sJmmkqAy4=",
+        "lastModified": 1736204625,
+        "narHash": "sha256-y1OxajWQrxP7naHYPoUCrf4AAhEqOGwpNbj+qBXSn5s=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "8f02b83dbc10aeeb27d2b4cb7d15f2611b2706b4",
+        "rev": "6199c32fe66a688ce7c3483de2b05b358ab7a0a6",
         "type": "github"
       },
       "original": {
@@ -117,11 +117,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1737469477,
-        "narHash": "sha256-GG0myEzULU7uiwoNGnwqiclki+Jg8dPG6nv7yKo7lMc=",
+        "lastModified": 1736165148,
+        "narHash": "sha256-AdKOlljgcTLOrJb3HFpaaoHWJhFrkVeT9HbRm0JvcwE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "2582766522e754520bf3f883f06560f89870a5ba",
+        "rev": "9f46f57b78d2ef865cd8c58eff8d430bb62a471a",
         "type": "github"
       },
       "original": {