diff --git a/nix/module.nix b/nix/module.nix
index 7c5887f..a5531a5 100644
--- a/nix/module.nix
+++ b/nix/module.nix
@@ -38,6 +38,7 @@ in {
       wantedBy = ["multi-user.target"];
       environment = {
         RUST_LOG = cfg.log_level;
+        RUSTFLAGS = "--cfg tokio_unstable";
       };
       serviceConfig = {
         EnvironmentFile = cfg.environmentFiles;