libghc-regexpr-dev software package provides Regular expression library like Perl/Ruby, you can install in your Debian 7 (Wheezy) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libghc-regexpr-dev
libghc-regexpr-dev is installed in your system.
Make ensure the libghc-regexpr-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep libghc-regexpr-dev *
You will get with libghc-regexpr-dev package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Haskell |
| Package | libghc-regexpr-dev |
| Version | 0.5.4-2+b2 [amd64, armhf, i386 |
| Description | Regular expression library like Perl/Ruby |
| Sub Section | Haskell |