>>> Emerging : portage://app-arch/p7zip-17.05-r2:run?{[]}

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

Calculating dependencies... done!

 └─step  1─┤ unmask  portage://app-arch/p7zip-17.05-r2

 └─step  2─┤ download  portage://app-arch/p7zip-17.05-r2
             │           └─ file ─┤ 6.41 Mb  	 p7zip-17.05.tar.gz
             │ download  portage://dev-lang/yasm-1.3.0-r2
             │           └─ file ─┤ 1.42 Mb  	 yasm-1.3.0.tar.gz

Total: 3 actions (1 unmask, 2 downloads), grouped into 2 steps.
       7.83 Mb to be downloaded.


>>> Assumptions taken during proving & planning:

  Package unmask (1 package):
  Add to /etc/portage/package.unmask:
    =app-arch/p7zip-17.05-r2