>>> Emerging : portage://app-misc/graphlcd-base-2.0.3-r3:run?{[]}

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

Calculating dependencies... done!

 └─step  1─┤ download  portage://app-misc/graphlcd-base-2.0.3-r3
             │           └─ file ─┤ 524.63 Kb  	 graphlcd-base-2.0.3.tar.gz
             │ download  portage://dev-libs/libhid-0.2.17-r1
             │           └─ file ─┤ 213.38 Kb  	 libhid-0.2.17.tar.gz
             │ download  portage://dev-libs/libusb-1.0.30
             │           └─ file ─┤ 640.73 Kb  	 libusb-1.0.30.tar.bz2
             │ download  portage://dev-libs/libusb-compat-0.1.9
             │           └─ file ─┤ 321.19 Kb  	 libusb-compat-0.1.9.tar.bz2
             │ download  portage://net-libs/libvncserver-0.9.15-r1
             │           └─ file ─┤ 586.32 Kb  	 LibVNCServer-0.9.15.tar.gz

 └─step  2─┤ install   portage://net-libs/libvncserver-0.9.15-r1
             │           └─ conf ─┤ USE = "ipv6 jpeg* png* ssl threads* zlib 24bpp filetransfer -gnutls -lzo -sasl -test"
             │ install   portage://dev-libs/libusb-1.0.30
             │           └─ conf ─┤ USE = "-debug -doc -examples -static-libs -test -udev -verify-sig"
             │                    │ SLOT = "1"

 └─step  3─┤ run       portage://dev-libs/libusb-1.0.30
             │ run       portage://net-libs/libvncserver-0.9.15-r1

 └─step  4─┤ install   portage://virtual/libusb-1-r2
             │           └─ conf ─┤ USE = "-udev"
             │                    │ SLOT = "1"

 └─step  5─┤ run       portage://virtual/libusb-1-r2

 └─step  6─┤ install   portage://dev-libs/libusb-compat-0.1.9
             │           └─ conf ─┤ USE = "-debug -examples"

 └─step  7─┤ run       portage://dev-libs/libusb-compat-0.1.9

 └─step  8─┤ install   portage://virtual/libusb-0-r2

 └─step  9─┤ run       portage://virtual/libusb-0-r2

 └─step 10─┤ install   portage://dev-libs/libhid-0.2.17-r1
             │           └─ conf ─┤ USE = "-doc"

 └─step 11─┤ run       portage://dev-libs/libhid-0.2.17-r1

 └─step 12─┤ install   portage://app-misc/graphlcd-base-2.0.3-r3
             │           └─ conf ─┤ USE = "fontconfig* -freetype -graphicsmagick -imagemagick"
             │                    │ LCD_DEVICES = "-ax206dpf -picolcd_256x64 -vnc"

 └─step 13─┤ run     portage://app-misc/graphlcd-base-2.0.3-r3

Total: 19 actions (5 downloads, 7 installs, 7 runs), grouped into 13 steps.
       2.23 Mb to be downloaded.



Error The proof for your build plan contains domain assumptions. Please verify:


>>> Domain assumptions

- Other: 
  unreachable(portage://dev-libs/libusb-compat-0.1.9:install,portage://virtual/libusb-0-r2:install)