>>> Emerging : portage://app-text/mdbook-0.5.4:run?{[]}

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

Calculating dependencies... done!

 └─step  1─┤ download  portage://app-text/mdbook-0.5.4
             │           └─ file ─┤ 8.18 Mb  	 mdbook-0.5.4-vendor.tar.xz
             │                    │ 960.57 Kb  	 mdbook-0.5.4.tar.gz

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