=> Bootstrap dependency digest>=20010302: found digest-20190127
=> Checksum SHA1 OK for rubysdl-2.2.0.gem
=> Checksum RMD160 OK for rubysdl-2.2.0.gem
=> Checksum SHA512 OK for rubysdl-2.2.0.gem
===> Installing dependencies for ruby25-rubysdl-2.2.0nb1
=> Build dependency x11-links>=1.32: found x11-links-1.32
=> Build dependency cwrappers>=20150314: found cwrappers-20180325
=> Full dependency ruby25-base>=2.5.9: NOT found
=> Verifying /nonexistent for ../../lang/ruby25-base
make[1]: don't know how to make /nonexistent. Stop

make[1]: stopped in /usr/pkgsrc/lang/ruby25-base
*** Error code 2

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