diff --git a/pkgs/by-name/ur/urbit/update-bin.sh b/pkgs/by-name/ur/urbit/update-bin.sh
index b7ee514e10a7..b7c4af1028e1 100755
--- a/pkgs/by-name/ur/urbit/update-bin.sh
+++ b/pkgs/by-name/ur/urbit/update-bin.sh
@@ -4,7 +4,7 @@
 set -euo pipefail
 
 ROOT="$(dirname "$(readlink -f "$0")")"
-NIX_DRV="$ROOT/default.nix"
+NIX_DRV="$ROOT/package.nix"
 if [ ! -f "$NIX_DRV" ]; then
   echo "ERROR: cannot find urbit in $ROOT"
   exit 1