Title says it all: Upstream has long dropped the dependency on libunique (in 19.1) so we should too. See: https://bazaar.launchpad.net/~deja-dup-hackers/deja-dup/22/view/head:/NEWS for reference. Reproducible: Always
+ 10 Mar 2012; Justin Lecher <jlec@gentoo.org> deja-dup-21.2.ebuild, + deja-dup-21.2-r1.ebuild: + Drop DEP in linunique, thanks Andreas Proschofsky spotting this, #407645 +
The dependendency on libunique seems to have been reintroduced accidentally in the deja-dup 22.0 ebuild, so reopening
+ 23 Mar 2012; Justin Lecher <jlec@gentoo.org> deja-dup-22.0.ebuild: + Drop libunique dep again, #407645 +