New comment by tornaria on void-packages repository

https://github.com/void-linux/void-packages/pull/33006#issuecomment-922087250

Comment:
To help the conversation, this affects the do_extract hook in the following way:
 1. The first step is to create a tmpdir named `"$XBPS_BUILDDIR/.extractdir-XXXXXX"`, we call that `$extractdir`
 2. The second step is the actual extraction, which is just as before but extracting everything into `$extractdir`
 3. The third step is the move, so that's where the semantics lies.

The move, with current behaviour, I think would be something like
```
if [ -n "$create_wrksrc" ]; then
	mkdir -p "$wrksrc" || msg_error "$pkgver: failed to create wrksrc.\n"
	echo mv -i "$extractdir"/* -t "$wrksrc" ||
		msg_error "$pkgver: failed to move $extractdir/* into $wrksrc"
else
	echo mv -i "$extractdir"/* -t "$XBPS_BUILDDIR" ||
		msg_error "$pkgver: failed to move $extractdir/* into $XBPS_BUILDIR"
fi
```