Miscellaneous fails to build

pkg install -forge miscellaneous
configure: error: The program GNU Units is required to install
Octave-Forge miscellaneous package.
pkg: error running the configure script for miscellaneous.
error: called from 'configure_make' in file
/usr/local/share/octave/3.8.1/m/pkg/private/configure_make.m near line
72, column 9
error: called from:
error: /usr/local/share/octave/3.8.1/m/pkg/private/install.m at line
199, column 5
error: /usr/local/share/octave/3.8.1/m/pkg/pkg.m at line 394, column 9

Is it possible to have units as a suggested package but not required?