pkg add: howto force the installation of a binary package?

[O. Hartmann]

Since this ever-fragile FreeBSD port editors/libreoffice fails on 11-CURRENT and
9.2-STABLE to compile (it fails on fours systems running the named flavours of OS), I try
to install the binary package via pkg add. But, very funny, I receive always the error:

pkg: Missing dependency matching Origin: 'net/openldap24-client' Version: '2.4.39'

The port in question is already installed, but I have 

pkg info -ox openldap
openldap-sasl-client-2.4.39 net/openldap24-sasl-client

This is fun. I tried to find the magical "force" knob in pkg-add to override such
(insane) restrictions, but I didn't find any.

Is there a regular way to install the port by force without checking for the dependency?
It seems that pkgng allows only installations of ports that do not dare to have different
options than the standard defined in the binary package expectations?

Thanks in advance for your suggestions,

Oliver

P.S. Please CC me.
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