tinywrkb [1] filed a deletion request for polkit-duktape [2]: duktape support is now merged, polkit-git package should suffice, it just needs to set duktape as the js backend during build configure.
[1] https://aur.archlinux.org/account/tinywrkb/ [2] https://aur.archlinux.org/pkgbase/polkit-duktape/
