The manual page of doscmd (man doscmd) still states the following:
"and then typing make install in the source directory (nor-
mally /usr/src/usr.bin/doscmd). For this to work, the X programmer's kit
must have been installed."
However doscmd is no longer part of the base system. So it should should
say "/usr/ports/emulators/doscmd" instead.
Over to maintainer.