It does not "follow conventions of the ecosystem", it requires me, a contributor, to make sure by myself that I have some trash installed and properly configure

It does not "follow conventions of the ecosystem", it requires me, a contributor, to make sure by myself that I have some trash installed and properly configured that you, the maintainer, consider to be "conventions of the ecosystem" (which surely never is, because there are about as many of such "conventions" as there are developers). I don't need yarn in my shell (and, apparently, neither did the maintainer), so I would have to make Docker container to use it. Here the maintainer did it for me, so I am grateful for that. If you happen to already have all this trash installed in your user space and you like typing several commands instead of 1 command (make): great, just run it without Docker, nobody forces you to install it. What's even the problem…