qt5-qtwebkit missing libxml2 dependency?

[Tobias Nygren <tnn%NetBSD.org@localhost>]

Hi,

qt5-qtwebkit fails to build on Debian Linux:

=> Checking for missing run-time search paths in 5.212.0.alpha4nb6
ERROR: /tnn/pkg/lib/libxml2.so.2: libxml2-2.9.12 is not a runtime dependency

Some change in the past few days has caused this new behaviour.
But there has not been any relevant changes to the package.

the package has:

TOOL_DEPENDS+=  libxslt-[0-9]*:../../textproc/libxslt
TOOL_DEPENDS+=  libxml2-[0-9]*:../../textproc/libxml2

... but then it also has:

.include "../../textproc/libxslt/buildlink3.mk"
(but not libxml2)

Given that there have been no changes here, it is possible the the
libxml2 problem is due to broken buildlink3.mk in some other package
that needs to properly export libxml2 runtime dependency.
Any ideas?

Kind regards,
-Tobias