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diff --git a/var/spack/repos/builtin/packages/py-openmc/package.py b/var/spack/repos/builtin/packages/py-openmc/package.py
new file mode 100644
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+++ b/var/spack/repos/builtin/packages/py-openmc/package.py
@@ -0,0 +1,56 @@
+# Copyright 2013-2021 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack import *
+
+
+class PyOpenmc(PythonPackage):
+    """The OpenMC project aims to provide a fully-featured Monte Carlo particle
+       transport code based on modern methods. It is a constructive solid
+       geometry, continuous-energy transport code that uses ACE format cross
+       sections. The project started under the Computational Reactor Physics
+       Group at MIT."""
+
+    homepage = "http://openmc.readthedocs.io/"
+    url = "https://github.com/openmc-dev/openmc/tarball/v0.11.0"
+    git = "https://github.com/openmc-dev/openmc.git"
+
+    version('develop', branch='develop')
+    version('master', branch='master')
+    version('0.12.0', tag='v0.12.0', submodules=True)
+    version('0.11.0', sha256='19a9d8e9c3b581e9060fbd96d30f1098312d217cb5c925eb6372a5786d9175af')
+
+    variant('mpi', default=False, description='Enable MPI support')
+
+    # keep py-openmc and openmc at the same version
+    for ver in ['develop', 'master', '0.12.0', '0.11.0']:
+        depends_on(
+            'openmc+mpi@{0}'.format(ver), when='@{0}+mpi'.format(ver),
+            type=('build', 'run')
+        )
+        depends_on(
+            'openmc~mpi@{0}'.format(ver), when='@{0}~mpi'.format(ver),
+            type=('build', 'run')
+        )
+
+    depends_on('git', type='build')
+    depends_on('python@3.5:', type=('build', 'run'))
+    depends_on('py-cython', type='build')
+    depends_on('py-h5py~mpi', when='~mpi', type=('build', 'run'))
+    depends_on('py-h5py+mpi', when='+mpi', type=('build', 'run'))
+    depends_on('py-ipython', type=('build', 'run'))
+    depends_on('py-lxml', type=('build', 'run'))
+    depends_on('py-matplotlib', type=('build', 'run'))
+    depends_on('py-mpi4py', when='+mpi', type=('build', 'run'))
+    depends_on('py-numpy@1.9:', type=('build', 'run'))
+    depends_on('py-pandas', type=('build', 'run'))
+    depends_on('py-setuptools', type='build')
+    depends_on('py-scipy', type=('build', 'run'))
+    depends_on('py-uncertainties', type=('build', 'run'))
+
+    @run_after('install')
+    def install_lib(self):
+        install(join_path(self.spec['openmc'].prefix.lib, 'libopenmc.*'),
+                self.prefix.lib)