diff --git a/configurations/host/waffentrager/configuration.nix b/configurations/host/waffentrager/configuration.nix
index 6bcf31e..c106e7f 100644
--- a/configurations/host/waffentrager/configuration.nix
+++ b/configurations/host/waffentrager/configuration.nix
@@ -10,10 +10,22 @@
       # Include the results of the hardware scan.
       ./hardware-configuration.nix
     ];
+
+  materus.profile.nixpkgs.enable = true;
   environment.systemPackages = with pkgs; [
     libraspberrypi
     raspberrypi-eeprom
     git
+
+    p7zip
+    unrar
+    bzip2
+    unzip
+    zstd
+    xz
+    zip
+    gzip
+
   ];
   sound.enable = false;
   boot.tmp.useTmpfs = true;
diff --git a/configurations/host/waffentrager/services/nextcloud.nix b/configurations/host/waffentrager/services/nextcloud.nix
index 277bbef..06081c9 100644
--- a/configurations/host/waffentrager/services/nextcloud.nix
+++ b/configurations/host/waffentrager/services/nextcloud.nix
@@ -39,13 +39,15 @@
         appstoreEnable = true;
         database.createLocally = true;
         nginx.recommendedHttpHeaders = true;
-        extraApps = { notify_push = pkgs.nextcloud28Packages.apps.notify_push; };
+        extraApps = with pkgs.nextcloud28Packages.apps; {
+          inherit notify_push previewgenerator;
+        };
         extraOptions = {
           mail_smtpmode = "sendmail";
           mail_sendmailmode = "pipe";
         };
 
-        phpOptions =  {
+        phpOptions = {
           "opcache.interned_strings_buffer" = "10";
         };
       };