diff --git a/mastodon.nix b/mastodon.nix
index 186b4fb..df63dff 100644
--- a/mastodon.nix
+++ b/mastodon.nix
@@ -7,6 +7,8 @@ let
 
   mastodon-lor-sh = pkgs.mastodon.override {
     srcOverride = pkgs.applyPatches {
+      version = mastodon-source.version;
+      yarnHash = mastodon-source.yarnHash;
       src = pkgs.fetchFromGitHub {
         owner = mastodon-source.src.owner;
         repo = mastodon-source.src.repo;