>>> Emerging : portage://sys-process/usbtop-1.0_p20220419:run?{[]}

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

Calculating dependencies... done!

 └─step  1─┤ useflag portage://net-libs/libpcap-1.11.0 (usb)

 └─step  2─┤ download  portage://dev-build/b2-5.5.3
             │           └─ file ─┤ 1.17 Mb  	 b2-5.5.3.tar.gz
             │ download  portage://dev-libs/boost-1.91.0-r2
             │           └─ file ─┤ 195.10 Mb  	 boost_1_91_0.tar.bz2
             │ download  portage://dev-libs/libusb-1.0.30
             │           └─ file ─┤ 640.73 Kb  	 libusb-1.0.30.tar.bz2
             │ download  portage://net-libs/libpcap-1.11.0
             │           └─ file ─┤ 1.00 Mb  	 libpcap-1.11.0.tar.gz
             │ download  portage://sys-process/usbtop-1.0_p20220419
             │           └─ file ─┤ 612.98 Kb  	 usbtop-1.0_p20220419.tar.gz

Total: 6 actions (1 useflag, 5 downloads), grouped into 2 steps.
       198.50 Mb to be downloaded.


>>> Assumptions taken during proving & planning:

  USE flag change (1 package):
  Add to /etc/portage/package.use:
    net-libs/libpcap usb