Install libghc-diagrams-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-diagrams-doc
Description:
Embedded domain-specific language for declarative vector graphics
Diagrams is an embedded domain-specific language for declarative vector graphics. This metapackage is just a wrapper that depends on the diagrams-core, diagrams-lib, and diagrams-cairo packages.
Homepage: http://projects.haskell.org/diagrams
Version: 1.4-3
Section: universe/doc