New comment by Goorzhel on void-packages repository

https://github.com/void-linux/void-packages/pull/37629#issuecomment-1162558643

Comment:
`fava` has adopted PEP 517 sometime between 1.18 and the current version, 1.21. Updating it leads to another brick wall, however:
<details>
<summary>git diff srcpkgs/fava/template</summary>

```diff
diff --git a/srcpkgs/fava/template b/srcpkgs/fava/template
index 9b0f83e540..87339be552 100644
--- a/srcpkgs/fava/template
+++ b/srcpkgs/fava/template
@@ -3,3 +3,3 @@ pkgname=fava
-version=1.18
-revision=2
-build_style=python3-module
+version=1.21
+revision=1
+build_style=python3-pep517
@@ -9 +9 @@ depends="python3-Babel python3-Cheroot python3-Flask-Babel python3-Flask
- python3-simplejson python3-Werkzeug python3-aiohttp"
+ python3-simplejson python3-Werkzeug python3-aiohttp python3-wheel"
@@ -16 +16 @@ distfiles="${PYPI_SITE}/f/fava/fava-${version}.tar.gz"
-checksum=21336b695708497e6f00cab77135b174c51feb2713b657e0e208282960885bf5
+checksum=d1a1422848e65e7eb275d80d322f6de2bcea1dc37b5412e8cf72c483d6a998d6
```
</details>

<details>
<summary>./xbps-src check fava</summary>

```
<...>
=> fava-1.21_1: running do_check ...
ImportError while loading conftest '/builddir/fava-1.21/tests/conftest.py'.
tests/conftest.py:19: in <module>
    from fava.application import _load_file
build/lib/fava/application.py:40: in <module>
    from fava import __version__ as fava_version
E   ImportError: cannot import name '__version__' from 'fava' (/builddir/fava-1.21/build/lib/fava/__init__.py)
=> ERROR: fava-1.21_1: do_check: 'PYTHONPATH="$PWD/build/lib" python3 -m pytest tests -k 'not cli and not static_url'' exited with 4
=> ERROR:   in do_check() at srcpkgs/fava/template:20
```
</details>

<details>
<summary>head -12 masterdir/builddir/fava-1.21/build/lib/fava/__init__.py</summary>

```
"""Fava – A web interface for Beancount."""
from __future__ import annotations

from pkg_resources import DistributionNotFound
from pkg_resources import get_distribution

try:
    __version__ = get_distribution(__name__).version
except DistributionNotFound:  # pragma: no cover
    # package is not installed
    pass
```
</details>