kpowersave on x86_64 - pkg_search_module( XSCRNSAVER xscrnsaver ) fails??

Guys, I can't explain this one. On i686, kpowersave built fine, but on x86_64, the build fails due to: CMake Error at cmake/modules/TDEMacros.cmake:20 (message): ################################################# xscrnsaver are required, but not found on your system ################################################# Call Stack (most recent call first): ConfigureChecks.cmake:42 (tde_message_fatal) CMakeLists.txt:40 (include) -- Configuring incomplete, errors occurred! In ConfigureChecks.cmake, we have: # check for xscrnsaver pkg_search_module( XSCRNSAVER xscrnsaver ) if( NOT XSCRNSAVER_FOUND ) tde_message_fatal( "xscrnsaver are required, but not found on your system" ) endif() On Arch the package is actually xscreensaver. On both i686 and x86_64 boxes, I have 'xscreensaver 5.12-2' installed, but for some reason, this works on i686. Dunno why... Where can I look at the actual code for "pkg_search_module()" so I can tell exactly what it is looking for? It almost seems like I've run into this before, but can't recall for the life of me what I did to address it? There must be some other package on the box that works that provides the dependency that kpowersave is looking for, but how do I figure that out? What say the experts? -- David C. Rankin, J.D.,P.E.