The line link failed. It's line 38:

"Refuse to build in Arch package environments. My license does not allow for packages, and I'm sick of dealing with people complaining about things broken by packagers. This is why we can't have nice things."

    if($ENV{DEBUGINFOD_URLS} MATCHES ".*archlinux.*")
        message(FATAL_ERROR "Unsupported environment.")
    endif()

Relevant commit: https://github.com/stenzek/duckstation/commit/30df16cc767297...