diff --git a/nixos/machines/orbi/social-matrix-terranix.nix b/nixos/machines/orbi/social-matrix-terranix.nix
index 5459dda..78789a7 100644
--- a/nixos/machines/orbi/social-matrix-terranix.nix
+++ b/nixos/machines/orbi/social-matrix-terranix.nix
@@ -4,13 +4,14 @@ let
   # 2. test with : https://federationtester.matrix.org/#terranix.org
   # 3. info at : https://silvio.github.io/docker-matrix/Example.configs.html
 
+  name = "terranix";
   domain = "terranix.org";
   baseUrl = "https://matrix.${domain}";
 
   synapse_port = 8008;
   federation_port = 8448;
 
-  matrix_create_user = pkgs.writers.writeBashBin "matrix-create-user-${domain}" ''
+  matrix_create_user = pkgs.writers.writeBashBin "matrix-create-user-${name}" ''
     ${pkgs.matrix-synapse}/bin/register_new_matrix_user \
         -k $( ${pkgs.gojq}/bin/gojq \
             --yaml-input \
@@ -55,8 +56,7 @@ in
   };
   users.groups.matrix-synapse.gid = config.ids.gids.matrix-synapse;
 
-  # todo : mount postgresql folder in a dedicated zfs pool
-  containers.matrix-terranix = {
+  containers."matrix-${name}" = {
     autoStart = true;
     privateNetwork = false;