λ(nix : ../NixPrelude.dhall) →
  let Bool/not =
        https://raw.githubusercontent.com/dhall-lang/dhall-lang/v22.0.0/Prelude/Bool/not.dhall
          sha256:723df402df24377d8a853afed08d9d69a0a6d86e2e5b2bac8960b0d4756c7dc4

  let throwIf = ./throwIf.dhall nix

  let throwIfNot
      : Bool → Text → ∀(a : Type) → a → a
      = λ(cond : Bool) → throwIf (Bool/not cond)

  in  throwIfNot