diff --git a/var/spack/repos/builtin/packages/legion/package.py b/var/spack/repos/builtin/packages/legion/package.py
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+##############################################################################
+# Copyright (c) 2017, Los Alamos National Security, LLC
+# Produced at the Los Alamos 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 LICENSE file 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 Legion(CMakePackage):
+    """Legion is a data-centric parallel programming system for writing
+       portable high performance programs targeted at distributed heterogeneous
+       architectures. Legion presents abstractions which allow programmers to
+       describe properties of program data (e.g. independence, locality). By
+       making the Legion programming system aware of the structure of program
+       data, it can automate many of the tedious tasks programmers currently
+       face, including correctly extracting task- and data-level parallelism
+       and moving data around complex memory hierarchies. A novel mapping
+       interface provides explicit programmer controlled placement of data in
+       the memory hierarchy and assignment of tasks to processors in a way
+       that is orthogonal to correctness, thereby enabling easy porting and
+       tuning of Legion applications to new architectures.
+    """
+    homepage = "http://legion.stanford.edu/"
+    url      = "https://github.com/StanfordLegion/legion/tarball/legion-17.02.0"
+
+    version('develop', git='https://github.com/StanfordLegion/legion', branch='master')
+    version('17.02.0', '31ac3004e2fb0996764362d2b6f6844a')
+
+    variant('debug', default=False, description='Build debug version')
+
+    depends_on("cmake@3.1:", type='build')
+    depends_on("gasnet")
+
+    def build_type(self):
+        spec = self.spec
+        if '+debug' in spec:
+            return 'Debug'
+        else:
+            return 'Release'
+
+    def cmake_args(self):
+        return ['-DLegion_USE_GASNet=ON', '-DLegion_BUILD_EXAMPLES=ON']