hsx2hs software package provides literal XML syntax in Haskell source code - preprocessor, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install hsx2hs
hsx2hs is installed in your system.
Make ensure the hsx2hs package were installed using the commands given below,
$ sudo dpkg-query -l | grep hsx2hs *
You will get with hsx2hs package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Haskell |
| Package | hsx2hs |
| Version | 0.13.5-1+b1 [amd64, arm64, arm |
| Description | literal XML syntax in Haskell source code - preprocessor |
| Sub Section | Haskell |