=> Bootstrap dependency digest>=20010302: found digest-20190127
=> Checksum SHA1 OK for mkvtoolnix-44.0.0.tar.xz
=> Checksum RMD160 OK for mkvtoolnix-44.0.0.tar.xz
=> Checksum SHA512 OK for mkvtoolnix-44.0.0.tar.xz
===> Installing dependencies for mkvtoolnix-44.0.0nb1
==========================================================================
The supported build options for mkvtoolnix are:

	qt5

You can select which build options to use by setting PKG_DEFAULT_OPTIONS
or the following variable.  Its current value is shown:

	PKG_OPTIONS.mkvtoolnix (not defined)

==========================================================================
=> Tool dependency gmake>=3.81: found gmake-4.2.1nb1
=> Tool dependency pkgconf-[0-9]*: found pkgconf-1.6.0
=> Tool dependency distcc-[0-9]*: found distcc-3.3
=> Build dependency docbook-xsl>=1.79.1nb5: found docbook-xsl-1.79.2nb3
=> Build dependency po4a-[0-9]*: found po4a-0.57
=> Build dependency ruby26-base>=2.6.6: 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/multimedia/mkvtoolnix