diff --git a/pkgs/mattermost.nix b/pkgs/mattermost.nix
index eb2ee6e..90a9fce 100644
--- a/pkgs/mattermost.nix
+++ b/pkgs/mattermost.nix
@@ -45,6 +45,7 @@ buildGoModule rec {
   '';
 
   subPackages = [ "cmd/mattermost" ];
+  offlineCache = webapp;
 
   tags = [ "production" ];