backintime: a simple backup tool
pypyPackages.random2: disable tests
fix eval
mesos: fix build
pypy: compile also curses
Disable Xen kernel builds

Xen itself is currently broken in Nixpkgs, so building kernels for it
is kind of pointless.
lttng-modules: Mark as broken

These do not build for any kernel:

  http://hydra.nixos.org/eval/1149989?filter=lttng&compare=1149981
Remove numerous failing kernel packages from Hydra

  http://hydra.nixos.org/eval/1149989?filter=linuxPackages
Add xar
help2man: update from 1.44.1 to 1.46.1 and add myself as a maintainer
lirc: update from 0.9.0 to 0.9.1, add meta information and adopt it
mcabber: update from 0.10.1 to 0.10.3, add meta-information and adopt it
Add haskell-tagged-transformer 0.7.1
Merge pull request #3883 from dmalikov/haskell-tagged-transformer

Add haskell-tagged-transformer 0.7.1
mcabber: fix mispelled stdenv
lirc: add missing semicolon
Add `extraConfig` option for SLiM

so that various configuration options can be set without having to
expose every single configurable parameter
Merge pull request #3885 from suvash/feature/add-configuration-options-for-slim

Add `extraConfig` option for SLiM
Fix K3D build