[Nix-dev] How do I know I can enableParallelBuilding?

[Marc Weber]

> We should als document why parallel building is disabled by default.
build 3 times -> if it works 3 times you are likely to be fine.
You never know for sure.

mkDervation {
  run = "1"; # should cause rebuild # inc 2 times
}

whether builds succeed depends on load/ moon /weather / your nose / disk
load / (you get it)

Sometimes the authors know (mailinglist/google/irc)

Marc Weber