old_contents: ##############################################################################
  # Copyright (c) 2013-2017, Lawrence Livermore National Security, LLC.
  # Produced at the Lawrence Livermore National Laboratory.
  #
  # This file is part of Spack.
  # Created by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
  # LLNL-CODE-647188
  #
  # For details, see https://github.com/llnl/spack
  # Please also see the NOTICE and LICENSE files for our notice and the LGPL.
  #
  # This program is free software; you can redistribute it and/or modify
  # it under the terms of the GNU Lesser General Public License (as
  # published by the Free Software Foundation) version 2.1, February 1999.
  #
  # This program is distributed in the hope that it will be useful, but
  # WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
  # conditions of the GNU Lesser General Public License for more details.
  #
  # You should have received a copy of the GNU Lesser General Public
  # License along with this program; if not, write to the Free Software
  # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  ##############################################################################
  from spack import *
  
  
  class PyQuantities(PythonPackage):
      """Support for physical quantities with units, based on numpy"""
  
      homepage = "http://python-quantities.readthedocs.org"
      url      = "https://pypi.io/packages/source/q/quantities/quantities-0.11.1.zip"
  
      version('0.11.1', 'f4c6287bfd2e93322b25a7c1311a0243')
  
      depends_on('python@2.6.0:')
      depends_on('py-numpy@1.4.0:', type=('build', 'run'))
  
new_contents: ##############################################################################
  # Copyright (c) 2013-2017, Lawrence Livermore National Security, LLC.
  # Produced at the Lawrence Livermore National Laboratory.
  #
  # This file is part of Spack.
  # Created by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
  # LLNL-CODE-647188
  #
  # For details, see https://github.com/llnl/spack
  # Please also see the NOTICE and LICENSE files for our notice and the LGPL.
  #
  # This program is free software; you can redistribute it and/or modify
  # it under the terms of the GNU Lesser General Public License (as
  # published by the Free Software Foundation) version 2.1, February 1999.
  #
  # This program is distributed in the hope that it will be useful, but
  # WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
  # conditions of the GNU Lesser General Public License for more details.
  #
  # You should have received a copy of the GNU Lesser General Public
  # License along with this program; if not, write to the Free Software
  # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  ##############################################################################
  from spack import *
  
  
  class PyQuantities(PythonPackage):
      """Support for physical quantities with units, based on numpy"""
  
      homepage = "http://python-quantities.readthedocs.org"
      url      = "https://pypi.io/packages/source/q/quantities/quantities-0.12.1.tar.gz"
  
      version('0.12.1', '9c9ecda15e905cccfc420e5341199512')
      version('0.11.1', 'f4c6287bfd2e93322b25a7c1311a0243',
              url="https://pypi.io/packages/source/q/quantities/quantities-0.11.1.zip")
  
      conflicts('py-numpy@1.13:', when='@:0.11.99')
  
      depends_on('python@2.6.0:')
      depends_on('py-numpy@1.4.0:', type=('build', 'run'))
  
subject: add version & py-numpy conflict (#5307)