>>> Emerging : portage://sci-mathematics/z3-5.3.1:run?{[]}

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

Calculating dependencies... done!

 └─step  1─┤ download  portage://sci-mathematics/z3-5.3.1
             │           └─ file ─┤ 7.50 Mb  	 z3-5.3.1.tar.gz

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