Building Config-Augeas cc -I/Users/me/perl5/perlbrew/perls/perl-5.24.1/lib/5.24.4/darwin-2level/CORE -DVERSION="1.000" -DXS_VERSION="1.000" -I/usr/local/Cellar/augeas/1.12.0/include -Wall -Wformat -Werror=format-security -c -fno-common -DPERL_DARWIN -mmacosx-version-min=10.13 -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include -DPERL_USE_SAFE_PUTENV -O3 -o lib/Config/Augeas.o lib/Config/Augeas.c ExtUtils::Mkbootstrap::Mkbootstrap('blib/arch/auto/Config/Augeas/Augeas.bs') cc -mmacosx-version-min=10.13 -bundle -undefined dynamic_lookup -L/usr/local/lib -fstack-protector-strong -o blib/arch/auto/Config/Augeas/Augeas.bundle lib/Config/Augeas.o -L/usr/local/Cellar/augeas/1.12.0/lib -laugeas ld: warning: dylib (/usr/local/lib/libaugeas.dylib) was built for newer macOS version (11.0) than being linked (10.13) Can't call method "get" on an undefined value at /Users/me/.cpanm/work/1615313587.71199/Config-Augeas-1.000/blib/lib/Config/Augeas.pm line 227. # Looks like your test exited with 255 just after 2. t/Config-Augeas.t ... Dubious, test returned 255 (wstat 65280, 0xff00) Failed 28/30 subtests