Add tags to nekbone package (#4825)

var/spack/repos/builtin/packages/nekbone/package.py

@@ -22,6 +22,7 @@
 # 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 *
 
 
@@ -34,6 +35,8 @@ class Nekbone(Package):
     homepage = "https://github.com/ANL-CESAR/"
     url = "https://github.com/ANL-CESAR/nekbone.git"
 
+    tags = ['proxy-app']
+
     version('develop', git='https://github.com/ANL-CESAR/nekbone.git')
 
     def install(self, spec, prefix):