Bug 452034 prevents gnetman building with the currently stable tcl:0 (8.5). It should depend on tcl:8.6, forcing the unstable version.
Created attachment 401472 [details, diff] Ebuild diff Make gnetman depend on tcl > 8.6
Gotcha: To upgrade tcl to 8.6, you'll need to also upgrade tk, and blt (or stable pythons won't build), so add the following to package.keywords: # required by @world (argument) ~dev-lang/tcl-8.6.4 # tk has to match ~dev-lang/tk-8.6.4 # And blt needs update =dev-tcltk/blt-2.4z-r12
See also the tcl 8.6 tracker bug 451368.
*** Bug 555796 has been marked as a duplicate of this bug. ***
I can confirm that updating tcl to 8.6 works. On the other hand, 8.6.6 is stable now anyways on all archs, so maybe this bug can be considered solved?
commit 5a52e7b11977f074eb97a57151a9be4c14bc4f0d Author: Michael Weber <xmw@gentoo.org> Date: Wed Feb 8 01:52:55 2017 +0100 sci-electronics/gnetman: Depend on tcl-8.6 (bug 546924, thanks Peter Fox). Package-Manager: Portage-2.3.3, Repoman-2.3.1