diff --git a/lib/spack/spack/architecture.py b/lib/spack/spack/architecture.py
index b251b82dcc7..f56e4a3fbbf 100644
--- a/lib/spack/spack/architecture.py
+++ b/lib/spack/spack/architecture.py
@@ -86,9 +86,20 @@ def __init__(self, name):
         self.name = name
 
     def add_target(self, name, target):
+<<<<<<< HEAD
         target.set_architecture(self)
         self.targets[name] = target          
     
+=======
+        """Used by the architecture specific subclass to list available targets. Raises an error
+        if the architecture specifies a name that is reserved by spack as an alias.
+        """
+        if name in ['front_end', 'fe', 'back_end', 'be', 'default']:
+            raise ValueError("%s is a spack reserved alias and cannot be the name of a target" % name)
+        self.targets[name] = target
+
+
+>>>>>>> 8b3f2ec1d117e1a8b206927f51db8684396c231b
     def target(self, name):
         """This is a getter method for the target dictionary that handles defaulting based
         on the values provided by default, front-end, and back-end. This can be overwritten
diff --git a/lib/spack/spack/architectures/cray.py b/lib/spack/spack/architectures/cray.py
index a79c9166842..420b7c589e2 100644
--- a/lib/spack/spack/architectures/cray.py
+++ b/lib/spack/spack/architectures/cray.py
@@ -10,6 +10,11 @@ class Cray(Architecture):
 
     def __init__(self):
         super(Cray, self).__init__('cray')
+        # Back End compiler needs the proper target module loaded.
+        self.add_target('ivybridge','craype-ivybridge')
+        # Could switch to use modules and fe targets for front end
+        # Currently using compilers by path for front end.
+        self.add_target('sandybridge')
 
     @classmethod
     def detect(self):