[opensuse-buildservice] Version numbers and Substitute: libXerces-c-devel

Hi, I'm now trying to build a package with the new libXerces-c-devel substitute mapping. Does substitute support version numbers? It will build with a BuildRequires: libXerces-c-devel but BuildRequires: libXerces-c-devel >= 2.7.0 produces this error; Getting buildinfo from server buildinfo is borken... it says: expansion error: nothing provides libXerces-c-devel >= 2.7.0 It would be nice to still be able to stipulate version numbers when using subst packages.