diff --git a/mastodon.nix b/mastodon.nix
index 3be80d3..c689d0c 100644
--- a/mastodon.nix
+++ b/mastodon.nix
@@ -9,6 +9,7 @@ let
     srcOverride = pkgs.applyPatches {
       version = mastodon-source.version;
       yarnHash = mastodon-source.yarnHash;
+      yarnMissingHashes = mastodon-source.yarnMissingHashes;
       src = pkgs.fetchFromGitHub {
         owner = mastodon-source.owner;
         repo = mastodon-source.repo;