diff --git a/overlay/misskey/default.nix b/overlay/misskey/default.nix
index c201f54..ac03b47 100644
--- a/overlay/misskey/default.nix
+++ b/overlay/misskey/default.nix
@@ -3,6 +3,8 @@
 let
   meta = builtins.fromJSON (builtins.readFile ./meta.json);
 
+  version = meta.rev;
+
   src = fetchFromGitHub {
     owner = "misskey-dev";
     repo = "misskey";