Когда я пытаюсь установить rmagic с:

gem install rmagic

это дает ошибку:

Building native extensions.  This could take a while...
ERROR:  Error installing rmagick:
    ERROR: Failed to build gem native extension.

    /home/biske/.rbenv/versions/2.0.0-p247/bin/ruby extconf.rb
checking for Ruby version >= 1.8.5... yes
checking for gcc... yes
checking for Magick-config... yes
checking for ImageMagick version >= 6.4.9... yes
checking for HDRI disabled version of ImageMagick... yes
checking for stdint.h... yes
checking for sys/types.h... yes
checking for wand/MagickWand.h... no

Can't install RMagick 2.13.2. Can't find MagickWand.h.
*** 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=${opt-dir}/include
    --with-opt-lib
    --without-opt-lib=${opt-dir}/lib
    --with-make-prog
    --without-make-prog
    --srcdir=.
    --curdir
    --ruby=/home/biske/.rbenv/versions/2.0.0-p247/bin/ruby


Gem files will remain installed in /home/biske/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rmagick-2.13.2 for inspection.
Results logged to /home/biske/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rmagick-2.13.2/ext/RMagick/gem_make.out

Я попытался найти проблему и обнаружил, что мне не хватает libmagickwand-dev. Я пытался установить его с:

sudo apt-get install libmagickwand-dev

но это вызывает ошибку:

The following packages have unmet dependencies:
 libmagickwand-dev : Depends: libmagickcore-dev (= 8:6.7.7.10-5ubuntu2) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

Если я попытаюсь установить его с:

sudo apt-get install libmagickcore-dev

это дает ошибку:

The following packages have unmet dependencies:
 libmagickcore-dev : Depends: librsvg2-dev but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

Если я попытаюсь установить его с:

sudo apt-get install librsvg2-dev

это дает ошибку:

The following packages have unmet dependencies:
 librsvg2-dev : Depends: libglib2.0-dev (>= 2.24.0) but it is not going to be installed
                Depends: libgdk-pixbuf2.0-dev (>= 2.23.5-2) but it is not going to be installed
                Depends: libcairo2-dev (>= 1.2.0) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

Если я пытаюсь установить libglib2.0-dev с:

sudo apt-get install libglib2.0-dev

это дает ошибку:

The following packages have unmet dependencies:
 libglib2.0-dev : Depends: libglib2.0-0 (= 2.36.0-1ubuntu1) but 2.36.0-1ubuntu2 is to be installed
                  Depends: libglib2.0-bin (= 2.36.0-1ubuntu1)
E: Unable to correct problems, you have held broken packages.

Если я установлю libglib2.0-0 с:

sudo apt-get install libglib2.0-0

это дает:

libglib2.0-0 is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Если я установлю libglib2.0-bin с:

sudo apt-get install libglib2.0-bin

это дает:

Reading package lists... Done
Building dependency tree       
Reading state information... Done
libglib2.0-bin is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Эти 2 библиотеки установлены, но выдают снова:

sudo apt-get install libglib2.0-dev

это дает ту же ошибку:

The following packages have unmet dependencies:
 libglib2.0-dev : Depends: libglib2.0-0 (= 2.36.0-1ubuntu1) but 2.36.0-1ubuntu2 is to be installed
                  Depends: libglib2.0-bin (= 2.36.0-1ubuntu1)
E: Unable to correct problems, you have held broken packages.

В чем может быть проблема здесь?

Я использую Ubuntu 13.04, rbenv, ruby 2.0.0, если это имеет значение.