libghc-hxt-regex-xmlschema-dev software package provides W3C XML Schema regular expressions library, you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libghc-hxt-regex-xmlschema-dev
libghc-hxt-regex-xmlschema-dev is installed in your system.
Make ensure the libghc-hxt-regex-xmlschema-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep libghc-hxt-regex-xmlschema-dev*
You will get with libghc-hxt-regex-xmlschema-dev package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Haskell |
| Package | libghc-hxt-regex-xmlschema-dev |
| Version | 9.0.4-5+b2 [amd64, armel, armh |
| Description | W3C XML Schema regular expressions library |
| Sub Section | Haskell |