old_contents: import os
  from dotinstall import packages
  from dotinstall import util
  
  
  def run():
      packages.install('yajl', method='pacman')
  
      os.chdir('/tmp')
      util.run_verbose(['git', 'clone', 'https://aur.archlinux.org/cower.git'])
      os.chdir('/tmp/cower')
      util.run_verbose(['makepkg', '-i', '--skippgpcheck'])
  
      packages.install('expac', method='pacman')
  
      os.chdir('/tmp')
      util.run_verbose(['git', 'clone', 'https://aur.archlinux.org/pacaur.git'])
      os.chdir('/tmp/pacaur')
      util.run_verbose(['makepkg', '-i', '--skippgpcheck'])
  
new_contents: import os
  from dotinstall import packages
  from dotinstall import util
  
  
  def run():
      packages.install('base-devel', method='pacman')
      packages.install('yajl', method='pacman')
  
      os.chdir('/tmp')
      util.run_verbose(['git', 'clone', 'https://aur.archlinux.org/cower.git'])
      os.chdir('/tmp/cower')
      util.run_verbose(['makepkg', '-i', '--skippgpcheck'])
  
      packages.install('expac', method='pacman')
  
      os.chdir('/tmp')
      util.run_verbose(['git', 'clone', 'https://aur.archlinux.org/pacaur.git'])
      os.chdir('/tmp/pacaur')
      util.run_verbose(['makepkg', '-i', '--skippgpcheck'])
  
subject: add required dependencies