perl-Authen-CAS-Client-0.07-4.fc27 fails to build in F27 because Perl 5.26.0 removed "." from @INC: Executing(%build): /bin/sh -e /var/tmp/rpm-tmp.u1oviC + umask 022 + cd /builddir/build/BUILD + cd Authen-CAS-Client-0.07 + /usr/bin/perl Makefile.PL INSTALLDIRS=vendor --skipdeps Can't locate inc/Module/Install.pm in @INC (you may need to install the inc::Module::Install module) (@INC contains: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5) at Makefile.PL line 4. BEGIN failed--compilation aborted at Makefile.PL line 4.
Upstream fixed in in 0.08, but the 0.08 release has bad license. I will fix 0.07 locally.