diff --git a/main.nix b/main.nix
index c7f6433..825c1e6 100644
--- a/main.nix
+++ b/main.nix
@@ -52,7 +52,7 @@ in
         artiqpkgs.openocd
         pkgs.iputils
       ];
-      sshKey = /var/lib/hydra/queue-runner/.ssh/id_rsa
+      sshKey = /var/lib/hydra/queue-runner/.ssh/id_rsa;
       phases = [ "buildPhase" ];
       buildPhase =
       ''