[nick@nick-pc ~]$ sudo pacman -S gcc-libs=7.1.1-2
resolving dependencies...
looking for conflicting packages...
:: gcc-libs and gcc-libs-multilib are in conflict. Remove gcc-libs-multilib? [y/N] y
error: failed to prepare transaction (could not satisfy dependencies)
:: gcc: removing gcc-libs-multilib breaks dependency 'gcc-libs=6.3.1-2'