portage-ng --merge
>>> Emerging : portage://sci-mathematics/msieve-1.53-r3:run?{[]}
These are the packages that would be merged, in order:
Calculating dependencies... done!
└─step 1─┤ download portage://sci-mathematics/gmp-ecm-7.0.6-r1
│ └─ file ─┤ 948.88 Kb ecm-7.0.6.tar.gz
│ download portage://sci-mathematics/msieve-1.53-r3
│ └─ file ─┤ 953.26 Kb msieve-1.53.tar.gz
└─step 2─┤ install portage://sci-mathematics/gmp-ecm-7.0.6-r1
│ └─ conf ─┤ USE = "openmp custom-tune"
│ │ CPU_FLAGS_X86 = "sse2*"
└─step 3─┤ run portage://sci-mathematics/gmp-ecm-7.0.6-r1
└─step 4─┤ install portage://sci-mathematics/msieve-1.53-r3
│ └─ conf ─┤ USE = "zlib ecm -mpi"
└─step 5─┤ run portage://sci-mathematics/msieve-1.53-r3
Total: 6 actions (2 downloads, 2 installs, 2 runs), grouped into 5 steps.
1.86 Mb to be downloaded.