old_contents: class yael(Wig):
  	tarball_uri = 'https://gforge.inria.fr/frs/download.php/file/33810/yael_v$RELEASE_VERSION$.tar.gz'
  	last_release_version = 'v438'
  	supported_features = ['python', 'atlas']
  	optional_dependencies = ['atlas']
  
  	def setup(self):
  		self.skip('make install', 'prefix')
  
  	def gen_configure_snippet(self):
  		return 'bash configure.sh %s' % ' '.join(self.configure_flags)
  
  	def switch_python_on(self):
  		self.configure_flags += ['--enable-numpy']
  	
  	def switch_atlas_on(self):
  		self.require('atlas')
  		self.before_configure += [S.export(S.LDFLAGS, '-lf77blas -llapack')]
  
new_contents: class yael(Wig):
  	tarball_uri = 'https://gforge.inria.fr/frs/download.php/file/33810/yael_v$RELEASE_VERSION$.tar.gz'
  	last_release_version = 'v438'
  	supported_features = ['python', 'atlas']
  	optional_dependencies = ['atlas', 'swig']
  
  	def setup(self):
  		self.skip('make install', 'prefix')
  
  	def gen_configure_snippet(self):
  		return 'bash configure.sh %s' % ' '.join(self.configure_flags)
  
  	def switch_python_on(self):
  		self.require('swig')
  		self.configure_flags += ['--enable-numpy']
  	
  	def switch_atlas_on(self):
  		self.require('atlas')
  		self.before_configure += [S.export(S.LDFLAGS, '-lf77blas -llapack')]
  
subject: Update yael.py