old_contents: import imp, os
  
  from fabric.api import *
  
  DEPLOYER_PATH = imp.find_module('deployer')[1]
  _backends = {}
  
  def yesno(input):
      if input.lower() in ['y', 'yes',]:
          return True
      elif input.lower() in ['n', 'no']:
          return False
      else:
          raise ValueError('Please enter "y" or "n".')
  
  def set_permissions(path, perms='775', user=None, group=None):
      if not user:
          require('user')
          user = env.user
      if not group:
          require('group')
          group = env.group
      sudo('chown -R %(user)s:%(group)s %(path)s;'
           'chmod -Rf %(perms)s %(path)s' % {'user': user,
                                             'group': group,
                                             'perms': perms,
                                             'path': path})
  
  def load_backend(mod_name, backend_dir):
      backend_key = '.'.join((mod_name, backend_dir,))
      if not _backends.has_key(backend_key):
          search_path = os.path.join(DEPLOYER_PATH, "tasks", backend_dir)
          f, path, description = imp.find_module(mod_name, [search_path,])
          try:
              backend = imp.load_module(mod_name, f, path, description)
              _backends[backend_key] = backend
          except ImportError:
              abort('Error: Could not load the backend "%s".' % backend_name)
          finally:
              f.close()
      else:
          backend = _backends[backend_key]
      return backend
  
  def call_backend_task(backend_type, task, *args, **kwargs):
      backends = list(env[backend_type]) # Ensure proper handling for list or string
      for backend_name in backends:
          backend = load_backend(backend_name, backend_type)
          getattr(backend, task)(*args, **kwargs)
  
new_contents: import imp, os
  
  from fabric.api import *
  
  DEPLOYER_PATH = imp.find_module('deployer')[1]
  _backends = {}
  
  def yesno(input):
      if input.lower() in ['y', 'yes',]:
          return True
      elif input.lower() in ['n', 'no']:
          return False
      else:
          raise ValueError('Please enter "y" or "n".')
  
  def set_permissions(path, perms='775', user=None, group=None):
      if not user:
          require('user')
          user = env.user
      if not group:
          require('group')
          group = env.group
      sudo('chown -R %(user)s:%(group)s %(path)s;'
           'chmod -Rf %(perms)s %(path)s' % {'user': user,
                                             'group': group,
                                             'perms': perms,
                                             'path': path})
  
  def load_backend(mod_name, backend_dir):
      if not _backends.has_key(backend_dir):
          search_path = os.path.join(DEPLOYER_PATH, "tasks")
          f, path, description = imp.find_module(backend_dir, [search_path,])
          try:
              backend = imp.load_module(backend_dir, f, path, description)
              _backends[backend_dir] = backend
          except ImportError:
              abort('Error: could not load backend package "%s".' % backend_dir)
  
      backend_key = '.'.join((mod_name, backend_dir,))
      if not _backends.has_key(backend_key):
          search_path = os.path.join(DEPLOYER_PATH, "tasks", backend_dir)
          f, path, description = imp.find_module(mod_name, [search_path,])
          try:
              backend = imp.load_module('.'.join((backend_dir, mod_name)), f, path, description)
              _backends[backend_key] = backend
          except ImportError:
              abort('Error: Could not load the backend "%s".' % backend_name)
          finally:
              f.close()
      else:
          backend = _backends[backend_key]
      return backend
  
  def call_backend_task(backend_type, task, *args, **kwargs):
      backends = list(env[backend_type]) # Ensure proper handling for list or string
      for backend_name in backends:
          backend = load_backend(backend_name, backend_type)
          getattr(backend, task)(*args, **kwargs)
  
subject: Fix relative import error in backend loading code. Now loads packages first, and then loads modules with the full package syntax.