>>> Emerging : portage://sci-mathematics/z3-5.1.0:run?{[]}

These are the packages that would be merged, in order:

Calculating dependencies... done!

 └─step  1─┤ download  portage://sci-mathematics/z3-5.1.0
             │           └─ file ─┤ 6.38 Mb  	 z3-5.1.0.tar.gz

Total: 1 action (1 download), grouped into 1 step.
       6.38 Mb to be downloaded.