perl-Net-Patricia-1.22-15.fc28 fails to build in F28: gcc -shared -Wl,-z,relro -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -L/usr/local/lib -fstack-protector-strong Patricia.o -o blib/arch/auto/Net/Patricia/Patricia.so libpatricia/libpatricia.a \ -lnsl -lperl \ /usr/bin/ld: cannot find -lnsl This is caused by upgrading glibc-headers from 2.26.9000-38.fc28 to 2.26.9000-40.fc28. glibc moved libnsl.so to libnsl2-devel. Net-Patricia's Makefile.PL:8 explicitly links to libnsl: WriteMakefile( 'NAME' => 'Net::Patricia', 'VERSION_FROM' => 'Patricia.pm', # finds $VERSION → 'LIBS' => ['-lnsl'], # e.g., '-lm' However the no header from libsl2-devel seems to be included by Net-Patricia-1.22 sources. It looks like a mistake.