me ~ $ sudo pacman -Syu
:: Synchronising package databases...
 core is up to date
 extra is up to date
 community is up to date
 multilib is up to date
:: Starting full system upgrade...
:: Replace compositeproto with extra/xorgproto? [Y/n] y
:: Replace damageproto with extra/xorgproto? [Y/n] y
:: Replace dmxproto with extra/xorgproto? [Y/n] y
:: Replace dri2proto with extra/xorgproto? [Y/n] y
:: Replace dri3proto with extra/xorgproto? [Y/n] y
:: Replace fixesproto with extra/xorgproto? [Y/n] y
:: Replace fontsproto with extra/xorgproto? [Y/n] y
:: Replace gcc-libs-multilib with core/gcc-libs? [Y/n] y
:: Replace gcc-multilib with core/gcc? [Y/n] y
:: Replace glproto with extra/xorgproto? [Y/n] y
:: Replace gnome-themes-standard with extra/gnome-themes-extra? [Y/n] y
:: Replace inputproto with extra/xorgproto? [Y/n] y
:: Replace kbproto with extra/xorgproto? [Y/n] y
:: Replace mime-types with extra/mailcap? [Y/n] y
:: Replace presentproto with extra/xorgproto? [Y/n] y
:: Replace randrproto with extra/xorgproto? [Y/n] y
:: Replace recordproto with extra/xorgproto? [Y/n] y
:: Replace renderproto with extra/xorgproto? [Y/n] y
:: Replace resourceproto with extra/xorgproto? [Y/n] y
:: Replace rfkill with core/util-linux? [Y/n] y
:: Replace scrnsaverproto with extra/xorgproto? [Y/n] y
:: Replace videoproto with extra/xorgproto? [Y/n] y
:: Replace wxgtk with extra/wxgtk2? [Y/n] y
:: Replace xextproto with extra/xorgproto? [Y/n] y
:: Replace xf86dgaproto with extra/xorgproto? [Y/n] y
:: Replace xf86driproto with extra/xorgproto? [Y/n] y
:: Replace xf86vidmodeproto with extra/xorgproto? [Y/n] y
:: Replace xineramaproto with extra/xorgproto? [Y/n] y
:: Replace xproto with extra/xorgproto? [Y/n] y
resolving dependencies...
ylooking for conflicting packages...
:: poppler and poppler-qt4 are in conflict. Remove poppler-qt4? [y/N] y
error: failed to prepare transaction (could not satisfy dependencies)
:: libxfont: removing fontsproto breaks dependency 'fontsproto>=2.1.3'