=> Bootstrap dependency digest>=20010302: found digest-20190127
=> Checksum SHA1 OK for rack-cache-1.10.0.gem
=> Checksum RMD160 OK for rack-cache-1.10.0.gem
=> Checksum SHA512 OK for rack-cache-1.10.0.gem
===> Installing dependencies for ruby27-rack-cache-1.10.0
=> Build dependency cwrappers>=20150314: found cwrappers-20180325
=> Full dependency ruby27-rack>=0.4: found ruby27-rack-2.2.2
=> Full dependency ruby27-base>=2.7.1: NOT found
=> Verifying /nonexistent for ../../lang/ruby27-base
make[1]: don't know how to make /nonexistent. Stop

make[1]: stopped in /usr/pkgsrc/lang/ruby27-base
*** Error code 2

Stop.
make: stopped in /usr/pkgsrc/www/ruby-rack-cache