dev-tex/biblatex-apa-6.6 contains RDEPEND="dev-texlive/texlive-bibtexextra dev-tex/biblatex-apa" DEPEND="${RDEPEND}" I guess it should depend on dev-tex/biblatex. Reproducible: Always Steps to Reproduce: 1.emerge -avt biblatex-apa Actual Results: Error: circular dependencies: (dev-tex/biblatex-apa-6.6:0/0::gentoo, ebuild scheduled for merge) depends on (dev-tex/biblatex-apa-6.6:0/0::gentoo, ebuild scheduled for merge) (buildtime) changing the dependecy to dev-tex/biblatex works.
08 Feb 2015; Manuel Rüger <mrueg@gentoo.org> biblatex-apa-6.6.ebuild: Fix RDEPEND. Thanks to Kristian. See bug #539120