=> Bootstrap dependency digest>=20211023: found digest-20220214
=> Checksum BLAKE2s OK for xylib-1.6.tar.bz2
=> Checksum SHA512 OK for xylib-1.6.tar.bz2
===> Installing dependencies for xyconvert-1.6nb9
==========================================================================
The following variables will affect the build process of this package,
xyconvert-1.6nb9.  Their current value is shown below:

        * JPEG_DEFAULT = jpeg

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

        * JPEGBASE (defined, but empty)
        * JPEG_TYPE = jpeg

You may want to abort the process now with CTRL-C and change the value
of variables in the first group before continuing.  Be sure to run
`/usr/bin/make clean' after the changes.
==========================================================================
=> Tool dependency glib2-tools-[0-9]*: found glib2-tools-2.80.4
=> Tool dependency libtool-base>=2.4.2nb9: found libtool-base-2.4.7nb1
=> Tool dependency mktools-[0-9]*: found mktools-20220614
=> Tool dependency cwrappers>=20150314: found cwrappers-20220403
=> Build dependency x11-links>=1.36: found x11-links-1.36
=> Build dependency boost-headers-1.85.*: NOT found
=> Verifying /nonexistent for ../../devel/boost-headers
make[1]: don't know how to make /nonexistent. Stop

make[1]: stopped in /usr/pkgsrc/devel/boost-headers
*** Error code 2

Stop.
make: stopped in /usr/pkgsrc/math/xyconvert