haskell-stack 1.9.3.1-1 (armhf binary) in ubuntu focal

 Stack is a program for developing Haskell projects. It is aimed at Haskellers
 both new and experienced.
 .
 It features:
 .
  * Installing GHC automatically.
 .
  * Installing packages needed for your project.
 .
  * Building your project.
 .
  * Testing your project.
 .
  * Benchmarking your project.