The building process needs jq, could you please add it to the makedepends array?

@flying-sheep I removed the line because it seems not to be necessary anymore since npm-7.4.0 (e.g. when https://github.com/npm/cli/issues/1103 was fixed). However I do not understand what you mean with it installs the "root" package.

There’s a bug in the PKGBUILD:

--user root installs the “root” package.

Instead you have to do chown -R root:root "$pkgdir/"*