diff --git a/artiq-fast.nix b/artiq-fast.nix
index 3b621cf..ddcb8ea 100644
--- a/artiq-fast.nix
+++ b/artiq-fast.nix
@@ -75,7 +75,7 @@ in
       mkdir $HOME/.ssh
       cp /opt/hydra_id_ed25519 $HOME/.ssh/id_ed25519
       cp /opt/hydra_id_ed25519.pub $HOME/.ssh/id_ed25519.pub
-      echo "rpi-1 ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPOBQVcsvk6WgRj18v4m0zkFeKrcN9gA+r6sxQxNwFpv" > $HOME/.ssh/known_hosts
+      echo "rpi-1 ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIACtBFDVBYoAE4fpJCTANZSE0bcVpTR3uvfNvb80C4i5" > $HOME/.ssh/known_hosts
       chmod 600 $HOME/.ssh/id_ed25519
       LOCKCTL=$(mktemp -d)
       mkfifo $LOCKCTL/lockctl