growing list of packages being held: libcurl3-gnutls IS librtmp1 the problem?
 

Distributor ID: Debian
Description: Debian GNU/Linux 7.8 (wheezy)
Release: 7.8
Codename: wheezy


sudo apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages have been kept back:
chromium dnsmasq-base icedtea-7-jre-jamvm iceweasel libcurl3 libcurl3-gnutls libxml-libxml-perl ntfs-3g openjdk-7-jre openjdk-7-jre-headless
0 upgraded, 0 newly installed, 0 to remove and 10 not upgraded.


When I try to install libcurl3-gnutls I get:

sudo apt-get install libcurl3-gnutls
Reading package lists... Done
Building dependency tree
Reading state information... 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:
libcurl3-gnutls : Depends: libgnutls-deb0-28 (>= 3.3.0) but it is not installable
Depends: librtmp1 (>= 2.4+20131018.git79459a2-3~) but it is not installable
E: Unable to correct problems, you have held broken packages.


This is my sources:
/etc/apt/sources.list


deb http://ftp.uk.debian.org/debian/ wheezy main non-free contrib
deb-src http://ftp.uk.debian.org/debian/ wheezy main non-free contrib

deb http://security.debian.org/ wheezy/updates main non-free contrib
deb-src http://security.debian.org/ wheezy/updates main non-free contrib

deb http://ftp.uk.debian.org/debian/ wheezy-updates main non-free contrib
deb-src http://ftp.uk.debian.org/debian/ wheezy-updates main non-free contrib

Solved by upgrading to Jessie.