>>> Emerging : portage://dev-lang/tcl-8.6.16:run?{[]}

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

Calculating dependencies... done!

 └─step  1─┤ download  portage://dev-lang/tcl-8.6.16
             │           └─ file ─┤ 6.70 Mb  	 tcl-core8.6.16-src.tar.gz

 └─step  2─┤ downgrade portage://dev-lang/tcl-8.6.16 (replaces pkg://dev-lang/tcl-8.6.17)
             │           └─ conf ─┤ USE = "threads* -debug"
             │                    │ SLOT = "0/8.6"

 └─step  3─┤ run     portage://dev-lang/tcl-8.6.16

Total: 3 actions (1 download, 1 downgrade, 1 run), grouped into 3 steps.
       6.70 Mb to be downloaded.