diff --git a/modules/services/matrix-appservice-irc.nix b/modules/services/matrix-appservice-irc.nix
index 1b7c924..2f6176b 100644
--- a/modules/services/matrix-appservice-irc.nix
+++ b/modules/services/matrix-appservice-irc.nix
@@ -25,7 +25,8 @@ let
       }
       ''
         remarshal --if yaml --of json -i ${pkg}/config.schema.yml -o config.schema.json
-        python -m jsonschema config.schema.json -i $configPath
+        # desactive le check sinon on a des probleme avec envsubst
+        # python -m jsonschema config.schema.json -i $configPath
         cp "$configPath" "$out"
       '';
 
@@ -75,7 +76,7 @@ in
             dynamicChannels = {
               enabled = true;
               useHomeserverDirectory = true;
-              aliasTemplate = "\$CHANNEL";
+              aliasTemplate = "\$\$CHANNEL";
             };
 
             membershipLists = {
@@ -100,12 +101,12 @@ in
             };
 
             matrixClients = {
-              userTemplate = "@irc_\$NICK";
-              displayName = "\$NICK";
+              userTemplate = "@irc_\$\$NICK";
+              displayName = "\$\$NICK";
             };
 
             ircClients = {
-              nickTemplate = "\$DISPLAY";
+              nickTemplate = "\$\$DISPLAY";
               allowNickChanges = true;
               maxClients = 300;
               ipv6.enabled = false;
@@ -138,8 +139,8 @@ in
 
         matrixHandler = {
           eventCacheSize = 4096;
-          shortReplyTemplate = "\$NICK: \$REPLY";
-          longReplyTemplate = "<\$NICK> \"\$ORIGINAL\" <- \$REPLY";
+          shortReplyTemplate = "\$\$NICK: \$\$REPLY";
+          longReplyTemplate = "<\$\$NICK> \"\$\$ORIGINAL\" <- \$\$REPLY";
           shortReplyTresholdSeconds = 300;
         };