diff --git a/hosts/arielle/default.nix b/hosts/arielle/default.nix
index 390e4e3..0a84aa7 100644
--- a/hosts/arielle/default.nix
+++ b/hosts/arielle/default.nix
@@ -9,5 +9,6 @@
     ../../system
     ../../system/web-server
     ../../system/mail-server
+    ../../system/matrix-server
   ];
 }
diff --git a/system/matrix-server/default.nix b/system/matrix-server/default.nix
index e190140..183392e 100644
--- a/system/matrix-server/default.nix
+++ b/system/matrix-server/default.nix
@@ -38,6 +38,7 @@ in
           ];
         }
       ];
+      extraConfigFiles = "/var/custom-access/matrix-shared-secret";
     };
   };