[opensuse-buildservice] rpmbuild does not like "BuildRequires: -post-build-checks"

Hi, in order to install our stuff to /opt/open-xchange, I needed to add BuildRequires: -post-build-checks to my specfile (I found that solution into the obs ml archive). That, however, makes it impossible for me to build locally using rpmbuild: sudo rpmbuild -bb open-xchange-xml/packaging/open-xchange-xml.spec error: line 6: Dependency tokens must begin with alpha-numeric, '_' or '/': BuildRequires: -post-build-checks Is there any other solution to this problem? -- With best regards, Carsten Hoeger