For those interested: I plan to solve this in Nimble by implementing what is described in this comment: [https://github.com/nim-lang/nimble/issues/240#issuecomment-255557708](https://github.com/nim-lang/nimble/issues/240#issuecomment-255557708).
> Btw the yes program just spams "y" lines on stdout, to answer all questions > of nimble with yes. Nimble has a flag for this: `nimble install -y`.