libghc-shelly-dev binary package in Ubuntu Focal riscv64

 Shelly provides convenient systems programming in Haskell,
 similar in spirit to POSIX shells. Shelly:
 .
  * is aimed at convenience and getting things done rather than
    being a demonstration of elegance
  * has detailed and useful error messages
  * maintains its own environment, making it thread-safe
  * is modern, using Text and system-filepath/system-fileio
 .
 Shelly is originally forked from the Shellish package.
 .
 This package provides a library for the Haskell programming language.
 See http://www.haskell.org/ for more information on Haskell.

Source package