>>> Emerging : portage://sci-mathematics/twelf-1.7.1-r2:run?{[]}

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

Calculating dependencies... done!

 └─step  1─┤ download  portage://dev-lang/mlton-20180207
             │ download  portage://sci-mathematics/twelf-1.7.1-r2
             │           └─ file ─┤ 1.09 Mb  	 twelf-src-1.7.1.tar.gz

Total: 2 actions (2 downloads), grouped into 1 step.
       1.09 Mb to be downloaded.