diff --git a/hosts/vm/mediakiwi/mediawiki.nix b/hosts/vm/mediakiwi/mediawiki.nix
index 4933a2c..3d2756b 100644
--- a/hosts/vm/mediakiwi/mediawiki.nix
+++ b/hosts/vm/mediakiwi/mediawiki.nix
@@ -4,6 +4,7 @@ let
   version = pkgs.mediawiki.version;
   major = lib.versions.major version;
   minor = lib.versions.minor version;
+  phpExtensions = config.services.mediawiki.phpPackage.extensions;
 in
 {
   age.secrets.mediawiki-admin-passwd = {
@@ -35,8 +36,8 @@ in
     max_execution_time = 1000
     max_input_time = 2000
     default_socket_timeout = 2000
-    extension = ${pkgs.php85Extensions.mbstring}/lib/php/extensions/mbstring.so
-    extension = ${pkgs.php85Extensions.luasandbox}/lib/php/extensions/luasandbox.so
+    extension = ${phpExtensions.mbstring}/lib/php/extensions/mbstring.so
+    extension = ${phpExtensions.luasandbox}/lib/php/extensions/luasandbox.so
   '';
 
   services.nginx.clientMaxBodySize = "512M";