diff --git a/config/hosts/ptouch-print-server/printing.nix b/config/hosts/ptouch-print-server/printing.nix
index ab5c58b..23cacca 100644
--- a/config/hosts/ptouch-print-server/printing.nix
+++ b/config/hosts/ptouch-print-server/printing.nix
@@ -53,9 +53,6 @@ let
     name = "forcecommand-lpr-wrapper";
     src = ./forcecommand-lpr-wrapper;
 
-    pyproject = true;
-    build-system = [ pkgs.python3Packages.setuptools ];
-
     propagatedBuildInputs = [
       pkgs.cups
     ];
diff --git a/config/hosts/public-web-static/virtualHosts/element-admin.hamburg.ccc.de.nix b/config/hosts/public-web-static/virtualHosts/element-admin.hamburg.ccc.de.nix
index 14f8e6f..8ee4336 100644
--- a/config/hosts/public-web-static/virtualHosts/element-admin.hamburg.ccc.de.nix
+++ b/config/hosts/public-web-static/virtualHosts/element-admin.hamburg.ccc.de.nix
@@ -1,14 +1,14 @@
 { config, pkgs, ... }:
 
 let
-  elementAdminVersion = "0.1.14";
+  elementAdminVersion = "0.1.11";
   elementAdmin = pkgs.stdenv.mkDerivation (finalAttrs: {
     pname = "element-admin";
     version = elementAdminVersion;
 
     src = pkgs.fetchzip {
       url = "https://github.com/element-hq/element-admin/archive/refs/tags/v${elementAdminVersion}.zip";
-      sha256 = "sha256-ncQjl2V+WhHeLSpPlj0yQ/yyr+RrEizep0pWD0nfECw=";
+      sha256 = "sha256-tSUTDPspQJjvP1KN4nUr4LYyjNQFj4pKMMA8JmavIxo=";
     };
 
     nativeBuildInputs = [
@@ -18,8 +18,8 @@ let
 
     pnpmDeps = pkgs.pnpm.fetchDeps {
       inherit (finalAttrs) pname version src;
-      fetcherVersion = 4;
-      hash = "sha256-YMYSJybWCLZuPs8fa4YNFgoQYdjfTQRlCOni7MaYjbQ=";
+      fetcherVersion = 2;
+      hash = "sha256-Hf4PWey5bczSNbc3QQ9z9X3OVUZ7VHXw7BHGQqJWPac=";
     };
 
     buildPhase = ''
diff --git a/config/hosts/public-web-static/virtualHosts/element.hamburg.ccc.de.nix b/config/hosts/public-web-static/virtualHosts/element.hamburg.ccc.de.nix
index c976780..f781dc0 100644
--- a/config/hosts/public-web-static/virtualHosts/element.hamburg.ccc.de.nix
+++ b/config/hosts/public-web-static/virtualHosts/element.hamburg.ccc.de.nix
@@ -1,10 +1,10 @@
 { pkgs, ... }:
 
 let
-  elementWebVersion = "1.12.29";
+  elementWebVersion = "1.12.18";
   element-web = pkgs.fetchzip {
     url = "https://github.com/element-hq/element-web/releases/download/v${elementWebVersion}/element-v${elementWebVersion}.tar.gz";
-    sha256 = "sha256-lyRg9vGW5TyU/ynl+qJcYHlmgAMO9GJbg7BuZ6Jym60=";
+    sha256 = "sha256-RvPJg28hgOgFs0GFZ9EPypQkUPkAns0alXYJeNst4Bk=";
   };
   elementSecurityHeaders = ''
     # Configuration best practices
diff --git a/flake.lock b/flake.lock
index 00c7882..d3c87ea 100644
--- a/flake.lock
+++ b/flake.lock
@@ -19,11 +19,27 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1790533781,
-        "narHash": "sha256-F+b8u43BVF5DlM0pz7JQSbtbwKy5PrHIT5zQUekXsD0=",
+        "lastModified": 1782847189,
+        "narHash": "sha256-twXPFqFsrrY5r28Zh7Homgcp2gUMBgQ6WDS98Q/3xFI=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "cf5e76507c6e23b59f7e0ffcc7baa2a39ddd8442",
+        "rev": "b6018f87da91d19d0ab4cf979885689b469cdd41",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-25.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-2605": {
+      "locked": {
+        "lastModified": 1789749394,
+        "narHash": "sha256-cFTsMQz8Hzn8MT49oaeLSHg62tE86NykugCWkeM2ypk=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "cf9d2fb3e50fa1cd5114c47505ea9177f7ff5f49",
         "type": "github"
       },
       "original": {
@@ -35,11 +51,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1790570722,
-        "narHash": "sha256-Avcz96Q+8OkfUIUXipBBVsQn19L622BtKP7mk6M+uls=",
+        "lastModified": 1786593342,
+        "narHash": "sha256-smTKQXMLLStzc8zJevMCckbk3My7SvbbLmPYZUJJKW4=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "419fe0f449b3fbe3bdd53d9840288db4509ec32e",
+        "rev": "6b5e5b7a6631f065bf6908986990b37d845f847f",
         "type": "github"
       },
       "original": {
@@ -53,6 +69,7 @@
       "inputs": {
         "authorizedKeysRepo": "authorizedKeysRepo",
         "nixpkgs": "nixpkgs",
+        "nixpkgs-2605": "nixpkgs-2605",
         "nixpkgs-unstable": "nixpkgs-unstable",
         "sops-nix": "sops-nix"
       }
@@ -64,11 +81,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1790498116,
-        "narHash": "sha256-rs9meAYxW3zzrh43yaW7htrqCD+X9+pupDPHN86fumI=",
+        "lastModified": 1786629091,
+        "narHash": "sha256-gkig4nPi1CWc4Z50GBsjE4ygSE7hMpl/TwID2an2Cck=",
         "owner": "Mic92",
         "repo": "sops-nix",
-        "rev": "5efb5a6f4f5ab192817d28557dd4d650fa14d866",
+        "rev": "a8627b21b9107c5711c96b84f32a9a4b3d45295f",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 238204e..f75f2d4 100644
--- a/flake.nix
+++ b/flake.nix
@@ -5,8 +5,9 @@
     # Use the NixOS small channels for nixpkgs.
     # https://nixos.org/manual/nixos/stable/#sec-upgrading
     # https://github.com/NixOS/nixpkgs
-    nixpkgs.url = "github:nixos/nixpkgs/nixos-26.05";
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-25.11";
     nixpkgs-unstable.url = "github:nixos/nixpkgs/nixpkgs-unstable";
+    nixpkgs-2605.url = "github:nixos/nixpkgs?ref=nixos-26.05";
 
     # # Add nixos-generators as an input.
     # # See here: https://github.com/nix-community/nixos-generators#using-in-a-flake
@@ -28,7 +29,7 @@
     };
   };
 
-  outputs = { self, nixpkgs, nixpkgs-unstable, sops-nix, authorizedKeysRepo, ... }:
+  outputs = { self, nixpkgs, nixpkgs-unstable, nixpkgs-2605, sops-nix, authorizedKeysRepo, ... }:
     let
       specialArgs = {
         inherit authorizedKeysRepo;
@@ -88,7 +89,7 @@
           ];
         };
 
-        git = nixpkgs.lib.nixosSystem {
+        git = nixpkgs-2605.lib.nixosSystem {
           inherit system specialArgs;
           modules = [
             self.nixosModules.common