=> Bootstrap dependency digest>=20010302: found digest-20190127
=> Checksum SHA1 OK for rb-kqueue-0.2.5.gem
=> Checksum RMD160 OK for rb-kqueue-0.2.5.gem
=> Checksum SHA512 OK for rb-kqueue-0.2.5.gem
===> Installing dependencies for ruby26-rb-kqueue-0.2.5
=> Build dependency cwrappers>=20150314: found cwrappers-20180325
=> Full dependency ruby26-ffi>=0.5.0: found ruby26-ffi-1.15.0
=> Full dependency ruby26-base>=2.6.7: NOT found
=> Verifying /nonexistent for ../../lang/ruby26-base
make[1]: don't know how to make /nonexistent. Stop

make[1]: stopped in /usr/pkgsrc/lang/ruby26-base
*** Error code 2

Stop.
make: stopped in /usr/pkgsrc/devel/ruby-rb-kqueue