File baselibs.conf of Package acl
# added in 2.2.51; change to just "<" with 2.2.52 or up. libacl1 obsoletes "libacl-<targettype> <= <version>" provides "libacl-<targettype> = <version>" libacl-devel requires -libacl-<targettype> requires "libacl1-<targettype> = <version>"