Build an Arch Linux repository with Open Build Service

I 'm trying to build my Arch Linux repository using Open Build Service. I created an account and posted my home project PKGBUILD. But the wiki and documentation only has documentation for Spec files, not for Arch Linux. Even if I upload PKGBUILD from the web client, the build fails. My repository and the package that has a problem is here https://build.opensuse.org/package/show/home:hayao/fascode-live-tools Please tell me how to Looking at other people's repositories, it looks like the repositories need files other than PKGBUILD, but I couldn't find any documentation about them.