www/firefox78, amd64, netbsd-9.1_STABLE: python collision

[is%netbsd.org@localhost]

Hello,

I tried to build www/firefox78 in a freshly created (through pkgcomp1)
netbsd-9.1_STABLE/amd64 sandbox.

explicit options are pulseaudio webrtc

It fails because gnome-doc-utils needs (or at least checks for) py27-libxml2,
but earlier py-libxml2, triggered by itstook, has been built as py37-libxml2.

I can't tell (yet) whether it would build without my explicit options to
firefox

Is this compination known to not-work, and if yes, which variant should
I try when i need webrtc?

Regards,
	-is


Log excerpt:

You may want to abort the process now with CTRL-C and change their value
before continuing.  Be sure to run `/usr/bin/make clean' after
the changes.
==========================================================================
=> Tool dependency checkperms>=1.1: found checkperms-1.12
=> Build dependency cwrappers>=20150314: found cwrappers-20180325
=> Full dependency py37-libxml2-[0-9]*: NOT found
=> Verifying package-install for ../../textproc/py-libxml2
=> Bootstrap dependency digest>=20010302: found digest-20190127
=> Checksum SHA1 OK for libxml2-2.9.10.tar.gz
=> Checksum RMD160 OK for libxml2-2.9.10.tar.gz
=> Checksum SHA512 OK for libxml2-2.9.10.tar.gz
===> Installing dependencies for py37-libxml2-2.9.10nb1
==========================================================================
The following variables will affect the build process of this package,
py37-libxml2-2.9.10nb1.  Their current value is shown below:

        * PYTHON_VERSION_DEFAULT = 37

Based on these variables, the following variables have been set:

        * PYPACKAGE = python37

You may want to abort the process now with CTRL-C and change their value
before continuing.  Be sure to run `/usr/bin/make clean' after
the changes.
==========================================================================
=> Tool dependency checkperms>=1.1: found checkperms-1.12
=> Build dependency py37-expat>=0: found py37-expat-3.7.9
=> Build dependency cwrappers>=20150314: found cwrappers-20180325
[...]
=> Checking for work-directory references in py37-libxml2-2.9.10nb1
=> Creating binary package /pkg_comp/obj/pkgsrc/textproc/py-libxml2/default/.packages/py37-libxml2-2.9.10nb1.tgz
===> Building binary package for py37-libxml2-2.9.10nb1
=> Creating binary package /pkg_comp/packages/All/py37-libxml2-2.9.10nb1.tgz
===> Installing binary package of py37-libxml2-2.9.10nb1
=> Returning to build of itstool-2.0.6nb1
[...]

===> Installing dependencies for gnome-doc-utils-0.20.10nb5
==========================================================================
The following variables will affect the build process of this package,
gnome-doc-utils-0.20.10nb5.  Their current value is shown below:

        * PYTHON_VERSION_DEFAULT = 37

Based on these variables, the following variables have been set:

        * PYPACKAGE = python27

You may want to abort the process now with CTRL-C and change their value
before continuing.  Be sure to run `/usr/bin/make clean' after
the changes.
==========================================================================
=> Tool dependency intltool>=0.40.0: found intltool-0.51.0nb5
=> Tool dependency gawk>=3.1.1: found gawk-5.1.0
=> Tool dependency gmake>=3.81: found gmake-4.2.1nb1
=> Tool dependency perl>=5.0: found perl-5.32.0nb1
=> Tool dependency pkgconf-[0-9]*: found pkgconf-1.6.0
=> Tool dependency checkperms>=1.1: found checkperms-1.12
=> Build dependency libxml2>=2.9.10nb2: found libxml2-2.9.10nb2
=> Build dependency libxslt>=1.1.34nb2: found libxslt-1.1.34nb3
=> Build dependency cwrappers>=20150314: found cwrappers-20180325
=> Full dependency py27-libxml2>=2.6.16: NOT found
=> Verifying package-install for ../../textproc/py-libxml2
=> Bootstrap dependency digest>=20010302: found digest-20190127
===> Installing binary package of py27-libxml2-2.9.10nb1
pkg_add: no pkg found for '/pkg_comp/obj/pkgsrc/textproc/py-libxml2/default/.packages/py27-libxml2-2.9.10nb1.tgz', sorry.
pkg_add: 1 package addition failed