How to override or set a variable for conf/freesbie.conf on CLI ?

Hi,

I would like override or set variable on command line.
For example:
make iso ISOPATH=/somewhere/livecd.iso
or
make iso PROFILS=foo

the last example would need this in conf/freesbie.conf:

case PROFILS in
    foo)
                ISOPATH=/somewhere/foo.iso
                CUSTOMROOT=/somewhere/foo
    bar)
                ISOPATH=/somewhere/bar.iso
                CUSTOMROOT=/somewhere/bar
esac

I tried:
env MAKE_ENV='PROFILS=foo' make iso, but if I understand correctly
it's only for buildworld and buildkernel.

How is this possible to do this ?

Thanks,
Regards.

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