diff --git a/var/spack/repos/builtin/packages/ray/package.py b/var/spack/repos/builtin/packages/ray/package.py
new file mode 100644
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+++ b/var/spack/repos/builtin/packages/ray/package.py
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+##############################################################################
+# Copyright (c) 2013-2016, 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 Ray(CMakePackage):
+    """Parallel genome assemblies for parallel DNA sequencing"""
+
+    homepage = "http://denovoassembler.sourceforge.net/"
+    url      = "https://downloads.sourceforge.net/project/denovoassembler/Ray-2.3.1.tar.bz2"
+
+    version('2.3.1', '82f693c4db60af4328263c9279701009')
+
+    depends_on('mpi')
+
+    @run_after('build')
+    def make(self):
+        mkdirp(prefix.bin)
+        make('PREFIX=%s' % prefix.bin)
+
+    def install(self, spec, prefix):
+        make('install')