1 2 3 4 5 6 7 8 9 10 11 12 13 14 15import Lake open Lake DSL package «lean-playground» where -- add package configuration options here lean_lib «LeanPlayground» where -- add library configuration options here @[default_target] lean_exe «hello» where root := `Main require mathlib from git "https://github.com/leanprover-community/mathlib4"