The web (which means downloading packages on demand) installer of MySQL on Windows in broken. (mysql-installer-web-community-184.108.40.206.msi)
The solution is to download the whole package. (mysql-installer-community-220.127.116.11.msi)
(Why? Just because…)
World of Open Source, 2017.
The full installer won’t let me to pick “developer package”, I have to click through the installer UI, which is a beast, in a bad way… You have to open the trees on the UI, click on the arrow (as far as I was able to play with it, no means to add all packages under a node, or double click the package instead of clicking on the arrow…)