[gentoo-user] Problem merging meson with setuptools. Requesting setuptools-45

[Gerion Entrup]

Hi,

I have a strange emerge/update problem:
```
# emerge -a1 "=meson-0.52.1::gentoo" "=setuptools-42.0.2::gentoo" -v
These are the packages that would be merged, in order:

Calculating dependencies... done!

!!! All ebuilds that could satisfy "dev-python/setuptools[python_targets_python3_6(-)?,python_targets_python3_7(-)?,python_targets_python3_8(-)?,-python_single_target_python3_6(-),-python_single_target_python3_7(-),-python_single_target_python3_8(-)]" have been masked.
!!! One of the following masked packages is required to complete your request:
- dev-python/setuptools-45.2.0::gentoo (masked by: package.mask, ~amd64 keyword)
/usr/portage/profiles/package.mask:
# Michał Górny <mgorny@g.o> (2020-01-16)
# The new version loses Python 2 support but does not introduce any real
# changes.  Let's mask it to reduce the noise, and hopefully try to get
# python2_7 out of default PYTHON_TARGETS first.

- dev-python/setuptools-45.1.0::gentoo (masked by: package.mask, ~amd64 keyword)

(dependency required by "dev-util/meson-0.52.1::gentoo" [ebuild])
(dependency required by "=meson-0.52.1::gentoo" [argument])
For more information, see the MASKED PACKAGES section in the emerge
man page or refer to the Gentoo Handbook.
```

I guess, this is unwanted, especially since both packages are stable.
I don't find anything in the meson ebuild that explain the dependency to
setuptools 45. Did I misconfigured something?

Best,
Gerion