=> Bootstrap dependency digest>=20010302: found digest-20160304
===> Installing for svmlin-1.0
for d in _ /usr/pkgsrc/work/math/svmlin/work/.destdir/usr/pkg/bin; do  test "$d" = _ || /usr/bin/install -d -m 755 "$d";  done
/usr/bin/install   -c -s  -o root -g wheel -m 755 svmlin /usr/pkgsrc/work/math/svmlin/work/.destdir/usr/pkg/bin/svmlin
install: unknown group wheel
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/work/math/svmlin/work/svmlin-v1.0
*** Error code 1

Stop.
bmake[1]: stopped in /usr/pkgsrc/math/svmlin
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/math/svmlin