Hi, I see the problem, anyway I don't know how to properly fix it.
I see in the boinc-manager dependencies only listed
Depends: ${shlibs:Depends}, ${misc:Depends}
IIRC misc:Depends puts libboinc7 into manager dependencies, and according to
clientgui/Makefile.am it is linked to the mananger
boincmgr_LDFLAGS = $(LIBBOINC) $(SQLITE3_LIBS) $(LIBNOTIFY_LIBS)
$(CLIENTGUILIBS) $(BOINC_EXTRA_LIBS) $(CLIENTLIBS) `pkg-config --libs gtk+-2.0`
-lno
So in order to avoid this link you first need to remove libboinc from the boinc
manager.
This is an upstream issue, not a debian one, can you report upstream?
objdump -p `which boincmgr`
NEEDED libboinc.so.7
G.
