Попытка установить Rmagick на Debian

Одна из вещей, которую вам нужно сделать, чтобы установить Rmagick

apt-get install libmagick9-dev 

Когда я пытаюсь это сделать, я получаю следующие ошибки

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.  Since you only requested a single operation it is extremely likely that the package is simply not installable and a bug report against that package should be filed. The following information may help to resolve the situation:  The following packages have unmet dependencies: libmagick9-dev: Depends: libjpeg62-dev but it is not going to be installed Depends: libbz2-dev but it is not going to be installed Depends: libtiff4-dev but it is not going to be installed Depends: libwmf-dev (>= 0.2.7-1) but it is not going to be installed Depends: libz-dev Depends: libpng12-dev but it is not going to be installed Depends: libfreetype6-dev but it is not going to be installed Depends: libexif-dev but it is not going to be installed Depends: libdjvulibre-dev but it is not going to be installed Depends: librsvg2-dev but it is not going to be installed Depends: libgraphviz-dev but it is not going to be installed E: Broken packages 

Я не знаю, что делать, чтобы это исправить?

РЕДАКТИРОВАТЬ 1: я пытался

sudo apt-get install librmagick-ruby 

и это работало нормально, но тогда мне нужно было установить камень fleximage

gem1.8 install fleximage 

и я получил следующее сообщение об ошибке

Building native extensions. This could take a while... ERROR: Error installing fleximage: ERROR: Failed to build gem native extension.  /usr/bin/ruby1.8 extconf.rb checking for Ruby version >= 1.8.5... yes checking for cc... yes checking for Magick-config... no Can't install RMagick 2.12.2. Can't find Magick-config in /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/var/lib/gems/1.8/bin  *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options.  Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=$/include --with-opt-lib --without-opt-lib=$/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/usr/bin/ruby1.8   Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/rmagick-2.12.2 for inspection. Results logged to /usr/lib/ruby/gems/1.8/gems/rmagick-2.12.2/ext/RMagick/gem_make.out