diff --git a/nix/scripts/update.sh b/nix/scripts/update.sh
index 2f2b721..4589622 100644
--- a/nix/scripts/update.sh
+++ b/nix/scripts/update.sh
@@ -43,7 +43,7 @@ patch --no-backup-if-mismatch --merge --input="$tmpdir/update.patch" package.yam
 
 # Update package.json again and get npm to update the package lock
 # file
-yq . package.yaml > package.json
+yq --output-format json package.yaml > package.json
 npm install --package-lock-only
 
 if ! git diff --quiet package.yaml package-lock.json; then