stack.yaml

# Build as: 
#   $ stack update
#   $ stack build
#   $ stack run example 

resolver: lts-18.21
# resolver: lts-14.27           # ghc 8.6.5
# resolver: lts-9.21            # ghc 8.0.2
# system-ghc: true              # uncomment to use the system installed GHC

allow-newer: true
rebuild-ghc-options: true