File baselibs.conf of Package xcb-util
libxcb-util1 xcb-util-devel requires -xcb-util-<targettype> requires "libxcb-util1-<targettype> = <version>"
libxcb-util1 xcb-util-devel requires -xcb-util-<targettype> requires "libxcb-util1-<targettype> = <version>"