The file mk.conf is the central configuration file for everything that has to do with building software. It is used by the BSD-style Makefiles in /usr/share/mk and especially by pkgsrc. Usually, it is found in the /etc directory. If it doesn't exist there, feel free to create it.

Because all configuration takes place in a single file, there are some variables so the user can choose different configurations based on whether he is building the base system or packages from pkgsrc. These variables are:

A typical mk.conf file would look like this:

# This is /etc/mk.conf

.if defined(BSD_PKG_MK) || defined(BUILDING_HTDOCS)
# The following lines apply to both pkgsrc and htdocs.

LOCALBASE=          /usr/pkg

# The following lines apply to the base system.