>>> Emerging : portage://sci-libs/alglib-3.20.0:run?{[]}

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

Calculating dependencies... done!

 └─step  1─┤ download  portage://sci-libs/alglib-3.20.0
             │           └─ file ─┤ 3.17 Mb  	 alglib-3.20.0.cpp.gpl.tgz

 └─step  2─┤ install   portage://sci-libs/alglib-3.20.0
             │           └─ conf ─┤ USE = "-test"
             │                    │ SLOT = "0/3.20"

 └─step  3─┤ run     portage://sci-libs/alglib-3.20.0

Total: 3 actions (1 download, 1 install, 1 run), grouped into 3 steps.
       3.17 Mb to be downloaded.