After trying to install emulators/linux_base-c6 from portmaster or from the /usr/ports/emulators/linux_base-c6 using make clean and make install clean, emulators/linux_base-c6 gives the following error:

root@riotskates:/ # cd /usr/ports/emulators/linux_base-c6
root@riotskates:/usr/ports/emulators/linux_base-c6 # make clean
===>  Cleaning for linux_base-c6-6.8
root@riotskates:/usr/ports/emulators/linux_base-c6 # make install clean
===>   linux_base-c6-6.8 depends on file: /usr/local/sbin/pkg - found
===> Fetching all distfiles required by linux_base-c6-6.8 for building
===>  Extracting for linux_base-c6-6.8
[: rpm/i686/centos/6.8/filesystem-2.4.30-3.el6.i686.rpm: unexpected operator
===>  Patching for linux_base-c6-6.8
===>  Configuring for linux_base-c6-6.8
===>  Building for linux_base-c6-6.8
===>  Staging for linux_base-c6-6.8
===>   Generating temporary packing list
348287 blocks
====> Compressing man pages (compress-man)
===>  Installing for linux_base-c6-6.8
===>  Checking if linux_base-c6 already installed
===>   Registering installation for linux_base-c6-6.8
Installing linux_base-c6-6.8...
cp: /compat/linux/etc/nsswitch.conf.dist: No such file or directory
cp: /compat/linux/etc/krb5.conf.dist: No such file or directory
cp: /compat/linux/etc/yp.conf.sample: No such file or directory

Running linux ldconfig...
/bin/sh: /compat/linux/sbin/ldconfig: not found

It appears to install properly, however when looking in the /compat/linux folder, nothing is installed.