portage-ng --merge
>>> Emerging : portage://sci-biology/vcftools-0.1.16:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://sci-biology/vcftools-0.1.16
│ └─ file ─┤ 469.31 Kb vcftools-0.1.16.tar.gz
└─step 2─┤ install portage://sci-biology/vcftools-0.1.16
│ └─ conf ─┤ USE = "-lapack"
└─step 3─┤ run portage://sci-biology/vcftools-0.1.16
Total: 3 actions (1 download, 1 install, 1 run), grouped into 3 steps.
469.31 Kb to be downloaded.