rmagick failure for ec2onrails

** [out :: [email protected]] 
 ** [out :: [email protected]] Setting up xsltproc (1.1.22-1ubuntu1) ...
 ** [out :: [email protected]] Processing triggers for libc6 ...
 ** [out :: [email protected]] ldconfig deferred processing now taking place
*** [err :: [email protected]] E:
*** [err :: [email protected]] Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/g/glib2.0/libglib2.0-0_2.16.3-1ubuntu3_i386.deb: 404 Not Found [IP: 91.189.88.31 80]
*** [err :: [email protected]] 
 ** [out :: [email protected]] Reading package lists...
 ** [out :: [email protected]] 
 ** [out :: [email protected]] Building dependency tree...
 ** [out :: [email protected]] 
 ** [out :: [email protected]] Reading state information...
 ** [out :: [email protected]] 
 ** [out :: [email protected]] Reading extended state information...
 ** [out :: [email protected]] 
 ** [out :: [email protected]] Initializing package states...
 ** [out :: [email protected]] 
 ** [out :: [email protected]] Writing extended state information...
 ** [out :: [email protected]] 
 ** [out :: [email protected]] Building tag database...
 ** [out :: [email protected]] 
    command finished
  * executing `ec2onrails:server:install_gems'
  * executing "sudo -p 'sudo password: ' gem install rmagick --no-rdoc --no-ri"
    servers: ["ec2-75-101-172-199.compute-1.amazonaws.com"]
    [[email protected]] executing command
ERROR:  Error installing rmagick:
	ERROR: Failed to build gem native extension.

/usr/bin/ruby1.8 extconf.rb install rmagick --no-rdoc --no-ri
checking for Ruby version >= 1.8.2... yes
checking for cc... yes
checking for Magick-config... no
Can't install RMagick 2.7.2. Can't find Magick-config in /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/X11R6/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=/usr/bin/ruby1.8


Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/rmagick-2.7.2 for inspection.
Results logged to /usr/lib/ruby/gems/1.8/gems/rmagick-2.7.2/ext/RMagick/gem_make.out
Bulk updating Gem source index for: http://gems.rubyforge.org/
Building native extensions.  This could take a while...
    command finished
command "sudo -p 'sudo password: ' gem install rmagick --no-rdoc --no-ri" failed on admin@ec2-75-101-172-1