zig@mizig:~/Downloads$ sudo aptitude install python-simplejson
The following NEW packages will be installed:
  python-simplejson
The following packages will be upgraded:
  python python-minimal
2 packages upgraded, 1 newly installed, 0 to remove and 531 not upgraded.
Need to get 280 kB of archives. After unpacking 725 kB will be used.
The following packages have unmet dependencies:
  python-all-dev: Depends: python (= 2.6.6-3+squeeze2) but 2.6.6-3+squeeze5 is to be installed.
  python-all: Depends: python (= 2.6.6-3+squeeze2) but 2.6.6-3+squeeze5 is to be installed.
  python-dev: Depends: python (= 2.6.6-3+squeeze2) but 2.6.6-3+squeeze5 is to be installed.
The following actions will resolve these dependencies:

     Remove the following packages:
1)     libboost-all-dev
2)     libboost-python-dev
3)     libboost-python1.42-dev
4)     python-all
5)     python-all-dev
6)     python-dev

     Leave the following dependencies unresolved:
7)     python-pyrex recommends python-all-dev