Install libghc-base-unicode-symbols-dev by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-base-unicode-symbols-dev
Description:
Unicode alternatives for common functions and operators
It defines new symbols for a number of functions and operators in the base package. . All symbols are documented with their actual definition and information regarding their Unicode code point. They should be completely interchangeable with their definitions. . For further Unicode goodness you can enable the UnicodeSyntax language extension [1]. This extension enables Unicode characters to be used to stand for certain ASCII character sequences, i.e. → instead of ->, ∀ instead of forall and many others. . This package provides a library for the Haskell programming language. See http://www.haskell.org/ for more information on Haskell.
Homepage: http://haskell.org/haskellwiki/Unicode-symbols
Version: 0.2.2.4-9build1
Section: universe/haskell