ns:~# apt-get install libpng2-dev
Reading package lists... Done
Building dependency tree... Done
Package libpng2-dev is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package libpng2-dev has no installation candidate
ns:~# apt-get install libjpeg-dev
Reading package lists... Done
Building dependency tree... Done
Note, selecting libjpeg62-dev instead of libjpeg-dev
libjpeg62-dev is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 30 not upgraded.
wtf?