Please check the results of SLE12 https://build.opensuse.org/package/live_build_log/home:tinita:branches:devel:languages:perl/perl-Crypt-HSXKPasswd/SLE_12_SP4/x86_64 failing to call the patch command. Maybe a different macro needs to be called. If you don't find a solution we can also exclude the build of the package for that SLE version