Thank you so much for explaining the issue with a nice small example of how to fix it. I was scratching my head as to what to do other than add Compat to each package! I’m putting in some version bounds on the DiffEq dependencies of Parameters as a temporary fix, and will help @mauro3 fix those escapes.
As for other dependencies. This is likely causing an issue in CMakeWrapper.jl (@rdeits) and SciKitLearn.jl (@cstjean). You might want to test and add version bounds.