pkg/52631: x11/xfce4-gtk2-engine build fails

[martin%NetBSD.org@localhost]

>Number:         52631
>Category:       pkg
>Synopsis:       x11/xfce4-gtk2-engine build fails
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Oct 20 06:50:00 +0000 2017
>Originator:     Martin Husemann
>Release:        NetBSD 8.99.4
>Organization:
The  NetBSD Foundation, Inc.
>Environment:
System: NetBSD night-owl.duskware.de 8.99.4 NetBSD 8.99.4 (NIGHT-OWL) #543: Thu Oct 19 10:44:25 CEST 2017 martin%night-owl.duskware.de@localhost:/usr/src/sys/arch/amd64/compile/NIGHT-OWL amd64
Architecture: x86_64
Machine: amd64
>Description:

Building x11/xfce4-gtk2-engine in my default user environment breaks:

Making all in gtk-3.0
gmake[2]: Entering directory '/usr/pkgobj/x11/xfce4-gtk2-engine/work/gtk-xfce-engine-3.2.0/gtk-3.0'
Traceback (most recent call last):
  File "/usr/pkg/bin/glib-mkenums", line 688, in <module>
Traceback (most recent call last):
  File "/usr/pkg/bin/glib-mkenums", line 688, in <module>
    process_file(fname)
  File "/usr/pkg/bin/glib-mkenums", line 420, in process_file
    process_file(fname)
  File "/usr/pkg/bin/glib-mkenums", line 420, in process_file
    line = curfile.readline()
  File "/usr/pkg/lib/python2.7/codecs.py", line 314, in decode
    line = curfile.readline()
  File "/usr/pkg/lib/python2.7/codecs.py", line 314, in decode
    (result, consumed) = self._buffer_decode(data, self.errors, final)
    (result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf8' codec can't decode byte 0xd6 in position 980: invalid continuation byte
UnicodeDecodeError: 'utf8' codec can't decode byte 0xd6 in position 980: invalid continuation byte
Makefile:737: recipe for target 'xfce_typebuiltin.h' failed


I have all pkgs build from scratch yesterday, no relevant (AFAICT)
settings in /etc/mk.conf. pkg_info -e py\* shows:

python27-2.7.14
py27-expat-2.7.14
py27-setuptools-36.6.0
py27-cElementTree-2.7.14
py27-libxml2-2.9.5
py27-six-1.11.0
py27-argparse-1.4.0
py27-pip-9.0.1
py27-pbr-3.1.1
py27-traceback2-1.4.0
py27-linecache2-1.0.0nb1
py27-unittest2-1.1.0
py27-funcsigs-1.0.2
py27-mock-2.0.0nb1
py27-libxslt-1.1.30


>How-To-Repeat:
try to build the pkg

>Fix:
n/a