root@debian:/# apt-get install pastebinit
Reading package lists... Done
Building dependency tree... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 pastebinit : Depends: python3 but it is not going to be installed
              Recommends: lsb-release but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
root@debian:/# aptitude install pastebinit
The following NEW packages will be installed:
  dh-python{a} file{a} libexpat1{a} libmagic1{a} libmpdec2{a} libpython-stdlib{a} libpython2.7-minimal{a} libpython2.7-stdlib{ab} libpython3-stdlib{a} libpython3.4-stdlib{ab} lsb-release{a} mime-support{a} pastebinit python{a}
  python-minimal{a} python2.7{ab} python2.7-minimal{a} python3{a} python3-minimal{a} python3.4{a} python3.4-minimal{ab}
0 packages upgraded, 21 newly installed, 0 to remove and 0 not upgraded.
Need to get 7999 kB of archives. After unpacking 38.2 MB will be used.
The following packages have unmet dependencies:
 python2.7 : Depends: libpython2.7-stdlib (= 2.7.10-5+b1) but 2.7.10-5 is to be installed.
 libpython2.7-stdlib : Depends: libpython2.7-minimal (= 2.7.10-5) but 2.7.10-5+b1 is to be installed.
 python3.4-minimal : Depends: libpython3.4-minimal (= 3.4.3-10+b1) but it is not going to be installed.
 libpython3.4-stdlib : Depends: libpython3.4-minimal (= 3.4.3-10+b1) but it is not going to be installed.
The following actions will resolve these dependencies:

      Keep the following packages at their current version:
1)      dh-python [Not Installed]
2)      libpython-stdlib [Not Installed]
3)      libpython2.7-stdlib [Not Installed]
4)      libpython3-stdlib [Not Installed]
5)      libpython3.4-stdlib [Not Installed]
6)      lsb-release [Not Installed]
7)      pastebinit [Not Installed]
8)      python [Not Installed]
9)      python2.7 [Not Installed]
10)     python3 [Not Installed]
11)     python3-minimal [Not Installed]
12)     python3.4 [Not Installed]
13)     python3.4-minimal [Not Installed]

      Leave the following dependencies unresolved:
14)     libpython2.7-minimal recommends libpython2.7-stdlib
15)     pastebinit recommends lsb-release
16)     python-minimal recommends python
17)     python2.7-minimal recommends python2.7
18)     python3.4-minimal recommends python3.4


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