rmagick gem fail

gistfile1.txt

Installing rmagick (2.13.1) with native extensions /Users/Nick/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:551:in `rescue in block in build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError)

        /Users/Nick/.rvm/rubies/ruby-1.9.2-p180/bin/ruby extconf.rb 
checking for Ruby version >= 1.8.5... yes
checking for gcc... yes
checking for Magick-config... no
Can't install RMagick 2.13.1. Can't find Magick-config in /Users/Nick/.rvm/gems/ruby-1.9.2-p180/bin:/Users/Nick/.rvm/gems/ruby-1.9.2-p180@global/bin:/Users/Nick/.rvm/rubies/ruby-1.9.2-p180/bin:/Users/Nick/.rvm/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/local/git/bin:/usr/X11/bin:/Users/Nick/Applications/postgres/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=${opt-dir}/include
	--with-opt-lib
	--without-opt-lib=${opt-dir}/lib
	--with-make-prog
	--without-make-prog
	--srcdir=.
	--curdir
	--ruby=/Users/Nick/.rvm/rubies/ruby-1.9.2-p180/bin/ruby


Gem files will remain installed in /Users/Nick/.rvm/gems/ruby-1.9.2-p180/gems/rmagick-2.13.1 for inspection.
Results logged to /Users/Nick/.rvm/gems/ruby-1.9.2-p180/gems/rmagick-2.13.1/ext/RMagick/gem_make.out
	from /Users/Nick/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:529:in `block in build_extensions'
	from /Users/Nick/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:504:in `each'
	from /Users/Nick/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:504:in `build_extensions'
	from /Users/Nick/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:180:in `install'
	from /Users/Nick/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.15/lib/bundler/source.rb:101:in `block in install'
	from /Users/Nick/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.15/lib/bundler/rubygems_integration.rb:78:in `preserve_paths'
	from /Users/Nick/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.15/lib/bundler/source.rb:91:in `install'
	from /Users/Nick/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.15/lib/bundler/installer.rb:58:in `block (2 levels) in run'
	from /Users/Nick/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.15/lib/bundler/rubygems_integration.rb:93:in `with_build_args'
	from /Users/Nick/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.15/lib/bundler/installer.rb:57:in `block in run'
	from /Users/Nick/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.15/lib/bundler/spec_set.rb:12:in `block in each'
	from /Users/Nick/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.15/lib/bundler/spec_set.rb:12:in `each'
	from /Users/Nick/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.15/lib/bundler/spec_set.rb:12:in `each'
	from /Users/Nick/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.15/lib/bundler/installer.rb:49:in `run'
	from /Users/Nick/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.15/lib/bundler/installer.rb:8:in `install'
	from /Users/Nick/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.15/lib/bundler/cli.rb:222:in `install'
	from /Users/Nick/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.15/lib/bundler/vendor/thor/task.rb:22:in `run'
	from /Users/Nick/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.15/lib/bundler/vendor/thor/invocation.rb:118:in `invoke_task'
	from /Users/Nick/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.15/lib/bundler/vendor/thor.rb:246:in `dispatch'
	from /Users/Nick/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.15/lib/bundler/vendor/thor/base.rb:389:in `start'
	from /Users/Nick/.rvm/gems/ruby-1.9.2-p180/gems/bundler-1.0.15/bin/bundle:13:in `<top (required)>'
	from /Users/Nick/.rvm/gems/ruby-1.9.2-p180/bin/bundle:19:in `load'
	from /Users/Nick/.rvm/gems/ruby-1.9.2-p180/bin/bundle:19:in `<main>'