>>> Emerging : portage://dev-lang/mrustc-0.12.0:run?{[]}

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

Calculating dependencies... done!

 └─step  1─┤ download  portage://dev-lang/mrustc-0.12.0
             │           └─ file ─┤ 1.37 Mb  	 mrustc-0.12.0.tar.gz
             │                    │ 259.73 Mb  	 rustc-1.90.0-src.tar.xz

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