[MinnowBoard] Minnowboard Max Yocto wiki error?

[Jack Black]

Here:
http://www.elinux.org/Minnowboard:MinnowMaxYoctoProject
it says to do:

echo 'MACHINE = "intel-core2-32"' >> conf/local.conf

(note, it's ambiguous whether I should do:
echo 'BBLAYERS += "$HOME/source/meta-intel"' >> conf/bblayers.conf
echo 'MACHINE = "intel-core2-32"' >> conf/local.conf
or just
echo 'MACHINE = "intel-core2-32"' >> conf/local.conf
So I only did the latter
)

But then I get

user at ubuntu:~/source/poky/build$ bitbake core-image-minimal
WARNING: Host distribution "Ubuntu-14.10" has not been validated with
this version of the build system; you may possibly experience
unexpected failures. It is recommended that you use a tested
distribution.
ERROR:  OE-core's config sanity checker detected a potential misconfiguration.
    Either fix the cause of this error or at your own risk disable the
checker (see sanity.conf).
    Following is the list of potential problems / advisories:

    Please set a valid MACHINE in your local.conf or environment

ERROR: Execution of event handler 'check_sanity_eventhandler' failed
ERROR: Command execution failed: Exited with 1

Is it acceptable to substitute intel-core2-32 with genericx86?