New comment by loreb on void-packages repository

https://github.com/void-linux/void-packages/pull/40063#issuecomment-1593290029

Comment:
Now it works, some files were supposed to be generated at build time but they weren't because... no idea why.
Anyway, starting from your latest commit:

```
diff --git a/srcpkgs/mnemosyne/template b/srcpkgs/mnemosyne/template
index a058fdae..d5d003c9 100644
--- a/srcpkgs/mnemosyne/template
+++ b/srcpkgs/mnemosyne/template
@@ -3,7 +3,7 @@ pkgname=mnemosyne
 version=2.10.1
 revision=1
 build_style=python3-module
-hostmakedepends="python3-setuptools"
+hostmakedepends="python3-setuptools python3-pyqt6-core-devel python3-pyqt6-devel-tools"
 depends="python3 python3-pyqt6 python3-pyqt6-webengine python3-Pillow python3-CherryPy
  python3-gtts python3-matplotlib python3-WebOb python3-Cheroot python3-PyOpenGL
  python3-setuptools qt6-webengine"
@@ -14,3 +14,8 @@ license="GPL-3.0-or-later"
 homepage="https://mnemosyne-proj.org/"
 distfiles="https://github.com/mnemosyne-proj/mnemosyne/archive/${version}.tar.gz"
 checksum=3691124f07335314830c943178a0b6feaf719310ad1bee582fa78726f5329276
+post_build() {
+	make build # some python files are generated
+	( cd mnemosyne/pyqt_ui && make default ) # FIXME why not already built?
+	# anyway, this is responsible for python3-pyqt6-devel-tools etc.
+}
diff --git a/srcpkgs/python3-gtts/template b/srcpkgs/python3-gtts/template
index 17b4fd45..949071dc 100644
--- a/srcpkgs/python3-gtts/template
+++ b/srcpkgs/python3-gtts/template
@@ -2,8 +2,8 @@
 pkgname=python3-gtts
 version=2.3.2
 revision=1
-build_style=python3-module
-hostmakedepends="python3-setuptools"
+build_style=python3-pep517
+hostmakedepends="python3-setuptools python3-wheel"
 depends="python3 python3-click"
 checkdepends="python3-click python3-mock python3-urllib3 python3-requests python3-testfixtures python3-wheel tox"
 short_desc="Module and CLI text-to-speech tool using Google Translate API"
@@ -14,6 +14,13 @@ changelog="https://raw.githubusercontent.com/pndurette/gTTS/main/CHANGELOG.md"
 distfiles="${PYPI_SITE}/g/gTTS/gTTS-${version}.tar.gz"
 checksum=5314f7dedb4230889ff4773edd37e101408497e166982027b8d9582a4585eb4f
 
+pre_install() {
+	#dist/gTTS-2.3.2-py3-none-any.whl
+	for i in dist/gTTS-*.whl ; do
+		test -e "$i" || continue
+		cp -f "$i" "${i,,}" # lowercase
+	done
+}
 post_install() {
 	vlicense LICENSE
 }

```

And then you'll need to install the missing deps listed above plus python3-pyqt6-multimedia, python3-pyqt6-sql and python3-argon2.
At least ItWorksForMe(tm) - let me know if it fails for you for any reason.