More setup.py things

Author: CoolCat467

Makefile

@@ -46,7 +46,7 @@ tag:
 		@-git tag v$(shell python3 -c "from trio_asyncio._version import __version__; print(__version__)")
 
 pypi:   tag
-	@if python3 setup.py -V 2>/dev/null | grep -qs + >/dev/null 2>&1 ; \
+	@if python3 python3 -c "from trio_asyncio._version import __version__; print(__version__)" 2>/dev/null | grep -qs + >/dev/null 2>&1 ; \
 		then echo "You need a clean, tagged tree" >&2; exit 1 ; fi
 	python3 setup.py sdist upload
 	## version depends on tag, so re-tagging doesn't make sense