=> Bootstrap dependency digest>=20010302: found digest-20190127
=> Checksum SHA1 OK for frr-7.5.tar.gz
=> Checksum RMD160 OK for frr-7.5.tar.gz
=> Checksum SHA512 OK for frr-7.5.tar.gz
===> Installing dependencies for frr-7.5
==========================================================================
The supported build options for frr are:

	doc

The currently selected options are:

	doc

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

	PKG_OPTIONS.frr (not defined)

==========================================================================
==========================================================================
The following variables will affect the build process of this package,
frr-7.5.  Their current value is shown below:

        * PYTHON_VERSION_DEFAULT = 38
        * VARBASE = /var

Based on these variables, the following variables have been set:

        * PYPACKAGE = python38
        * TERMCAP_TYPE = termcap

You may want to abort the process now with CTRL-C and change their value
before continuing.  Be sure to run `/usr/bin/make clean' after
the changes.
==========================================================================
=> Tool dependency py38-sphinx>=2.4.4: found py38-sphinx-2.4.4
=> Tool dependency cmocka>=1.1.5: found cmocka-1.1.5
=> Tool dependency libtool-base>=2.4.2nb9: found libtool-base-2.4.6nb2
=> Tool dependency automake>=1.9: found automake-1.16.3
=> Tool dependency autoconf>=2.58: found autoconf-2.69nb10
=> Tool dependency bison>=1.0: NOT found
=> Verifying /nonexistent for ../../devel/bison
make[1]: don't know how to make /nonexistent. Stop

make[1]: stopped in /usr/pkgsrc/devel/bison
*** Error code 2

Stop.
make: stopped in /usr/pkgsrc/net/frr