MarsSeed [1] filed a deletion request for nginx-mainline-mod-auth_pam [2]: Duplicate of extra/nginx-mod-auth-pam, same version. Latter can work just as well with the 'nginx-mainline' package.
https://archlinux.org/packages/extra/x86_64/nginx-mod-auth-pam/ [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/nginx-mainline-mod-auth_pam/
