sci-astronomy/stellarium has a dependency on dev-qt/qtquick1, which will be deprecated in the upcoming Qt 5.6 release. However, according to the corresponding debian bug report[1], it is unused (since 0.14.1 at least) and Stellarium compiles and runs without dev-qt/qtquick1 indeed. 1. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=808698
dropped the unneeded dep. thanks for the bug report.