=> Bootstrap dependency digest>=20211023: found digest-20220214
===> Skipping vulnerability checks.
WARNING: No /usr/pkg/pkgdb/pkg-vulnerabilities file found.
WARNING: To fix run: `/usr/sbin/pkg_admin -K /usr/pkg/pkgdb fetch-pkg-vulnerabilities'.
===> Building for pngcrush-1.8.13
cd /tmp/graphics/pngcrush/work/pngcrush-1.8.13-nolib && gcc -DPNG_USE_LOCAL_ARRAYS  -O2 -fPIC -D_FORTIFY_SOURCE=2 -I/usr/pkg/include -I/usr/include `libpng-config --cflags` -o pngcrush pngcrush.c    -Wl,-zrelro -L/usr/pkg/lib -Wl,-R/usr/pkg/lib -L/usr/lib -Wl,-R/usr/lib `libpng-config --ldflags` -lz
ld: cannot find -lpng16
*** Error code 1

Stop.
make[1]: stopped in /amd/pkgsrc/CHROOT/P/pkgsrc/graphics/pngcrush
*** Error code 1

Stop.
make: stopped in /amd/pkgsrc/CHROOT/P/pkgsrc/graphics/pngcrush