let mkPackage = https://raw.githubusercontent.com/spacchetti/spacchetti/0.12.3-20190226/src/mkPackage.dhall let upstream = https://raw.githubusercontent.com/spacchetti/spacchetti/0.12.3-20190226/src/packages.dhall let overrides = { halogen = upstream.halogen ⫽ { version = "v5.0.0-rc.2" } , halogen-vdom = upstream.halogen-vdom ⫽ { version = "v5.1.0" } } let additions = {=} in upstream ⫽ overrides ⫽ additions