gnumach-image-1.3.99-xen-486-d software package provides GNU version of the Mach microkernel for Xen for debugging, 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 gnumach-image-1.3.99-xen-486-d
gnumach-image-1.3.99-xen-486-d is installed in your system.
Make ensure the gnumach-image-1.3.99-xen-486-d package were installed using the commands given below,
$ sudo dpkg-query -l | grep gnumach-image-1.3.99-xen-486-d*
You will get with gnumach-image-1.3.99-xen-486-d package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Debug packages |
| Package | gnumach-image-1.3.99-xen-486-d |
| Version | 2:1.3.99.dfsg.git20120610-1 |
| Description | GNU version of the Mach microkernel for Xen for debugging |
| Sub Section | debug |