build: fix tox environment creation with the latest updates

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 envlist = check, tests
-isolated_build = True
+isolated_build = true
 labels =
 	release = version, docs, publish
 dependencies = -e .[journald,pacman,s3,shell,stats,validator,web]
@@ -27,7 +27,9 @@ description = Run common checks like linter, mypy, etc
 deps =
 	{[tox]dependencies}
 	-e .[check]
+pip_pre = true
 setenv =
+	CFLAGS="-Wno-unterminated-string-initialization"
 	MYPYPATH=src
 commands =
 	autopep8 --exit-code --max-line-length 120 -aa -i -j 0 -r "src/{[tox]project_name}" "tests/{[tox]project_name}"
@@ -38,16 +40,16 @@ commands =
 
 [testenv:docs]
 description = Generate source files for documentation
+allowlist_externals =
+	bash
+	find
+	mv
+changedir = src
 depends =
 	version
 deps =
 	{[tox]dependencies}
 	-e .[docs]
-changedir = src
-allowlist_externals =
-	bash
-	find
-	mv
 setenv =
 	SPHINX_APIDOC_OPTIONS=members,no-undoc-members,show-inheritance
 commands =
@@ -65,16 +67,16 @@ description = Generate html documentation
 deps =
 	{[tox]dependencies}
 	-e .[docs]
-recreate = True
+recreate = true
 commands =
 	sphinx-build -b html -a -j auto -W docs {envtmpdir}{/}html
 
 [testenv:publish]
 description = Create and publish release to GitHub
-depends =
-	docs
 allowlist_externals =
 	git
+depends =
+	docs
 passenv =
 	SSH_AUTH_SOCK
 commands =
@@ -89,15 +91,18 @@ description = Run tests
 deps =
 	{[tox]dependencies}
 	-e .[tests]
+pip_pre = true
+setenv =
+	CFLAGS="-Wno-unterminated-string-initialization"
 commands =
 	pytest {posargs}
 
 [testenv:version]
 description = Bump package version
-deps =
-	packaging
 allowlist_externals =
 	sed
+deps =
+	packaging
 commands =
 	# check if version is set and validate it
 	{envpython} -c 'from packaging.version import Version; Version("{posargs}")'