diff --git a/lib/spack/env/cc b/lib/spack/env/cc
index fa85bb595e..b6c6e03e42 100755
--- a/lib/spack/env/cc
+++ b/lib/spack/env/cc
@@ -70,6 +70,23 @@ for param in $parameters; do
     fi
 done
 
+
+#
+# Cray module environment-related stuff.
+#
+if [ ! -z "$SPACK_CRAYPE" ]; then
+    cur_pe=$(module list 2>&1 | grep PrgEnv | grep -o 'PrgEnv-[^/]*')
+    if [ ! -z "$cur_pe" ]; then
+        module swap $cur_pe $SPACK_CRAYPE
+    else
+        module load $SPACK_CRAYPE
+    fi
+fi
+
+if [ ! -z "$SPACK_COMP_MODULE" ]; then
+    module load $SPACK_COMP_MODULE
+fi
+
 #
 # Figure out the type of compiler, the language, and the mode so that
 # the compiler script knows what to do.
diff --git a/lib/spack/spack/build_environment.py b/lib/spack/spack/build_environment.py
index a133faa629..68388958f5 100644
--- a/lib/spack/spack/build_environment.py
+++ b/lib/spack/spack/build_environment.py
@@ -57,6 +57,9 @@
 SPACK_SHORT_SPEC       = 'SPACK_SHORT_SPEC'
 SPACK_DEBUG_LOG_DIR    = 'SPACK_DEBUG_LOG_DIR'
 
+SPACK_CRAYPE           = 'SPACK_CRAYPE'
+SPACK_COMP_MODULE      = 'SPACK_COMP_MODULE'
+
 
 class MakeExecutable(Executable):
     """Special callable executable object for make so the user can
@@ -105,6 +108,12 @@ def set_compiler_environment_variables(pkg):
 
     os.environ['SPACK_COMPILER_SPEC']  = str(pkg.spec.compiler)
 
+    if compiler.PrgEnv:
+        os.environ['SPACK_CRAYPE']       = compiler.PrgEnv
+        os.environ['SPACK_COMP_MODULE']  = compiler.module
+
+
+
 
 def set_build_environment_variables(pkg):
     """This ensures a clean install environment when we build packages.
diff --git a/lib/spack/spack/compiler.py b/lib/spack/spack/compiler.py
index 1e800a8979..e7d450ee8b 100644
--- a/lib/spack/spack/compiler.py
+++ b/lib/spack/spack/compiler.py
@@ -25,6 +25,7 @@
 import os
 import re
 import itertools
+import subprocess
 from datetime import datetime
 
 import llnl.util.tty as tty
@@ -98,7 +99,14 @@ class Compiler(object):
     cxx11_flag = "-std=c++11"
 
 
-    def __init__(self, cspec, cc, cxx, f77, fc):
+    # Cray PrgEnv name that can be used to load this compiler
+    PrgEnv = None
+
+    # Name of module used to switch versions of this compiler
+    PrgEnv_compiler = None
+
+
+    def __init__(self, cspec, cc, cxx, f77, fc, module=None):
         def check(exe):
             if exe is None:
                 return None
@@ -111,6 +119,8 @@ def check(exe):
         self.fc  = check(fc)
 
         self.spec = cspec
+        self.module = module
+
 
 
     @property
@@ -255,6 +265,61 @@ def find(cls, *path):
         return list(compilers.values())
 
 
+    @classmethod
+    def find_in_modules(cls):
+        compilers = []
+
+        if cls.PrgEnv:
+            if not cls.PrgEnv_compiler:
+                tty.die('Must supply PrgEnv_compiler with PrgEnv')
+
+            output = _shell('module avail %s' % cls.PrgEnv_compiler)
+            matches = re.findall(r'(%s)/([^\s(]*)' % cls.PrgEnv_compiler, output)
+
+            for name, version in matches:
+                v = version + '-craype'
+                comp = cls(spack.spec.CompilerSpec(name + '@' + v),
+                           'cc', 'CC', 'ftn', 'ftn', name +'/' + v)
+
+                compilers.append(comp)
+
+        return compilers
+
+
+def _cur_prgenv():
+    out, err = subprocess.Popen(
+        ['module list'], shell=True,
+        stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()
+    matches = re.findall(r'(PrgEnv-[^/]*)/', err)
+    return matches[0]
+
+
+def _module_shell(module, *args):
+    cmd =  'module swap %s %s;' % (_cur_prgenv(), module)
+    cmd += 'module load %s;'    % compiler
+    cmd += 'module unload cray-libsci;'
+
+#  +
+#            'module load craype-network-gemini;' +
+#            'module load %s;' % module +
+#            'module swap gcc/4.6.1;' +
+#            'module load eswrap; ' +
+#            'module load craype-mc12; ' +
+#            'module load cray-shmem; ' +
+#            'module load cray-mpich; ')
+    cmd += ' '.join(args)
+    out, err = subprocess.Popen([cmd + ' '.join(args)], shell=True,
+                                stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()
+    return out
+
+
+def _shell(*args):
+    return subprocess.Popen([' '.join(args)], shell=True,
+                            stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()[1]
+
+
+
+
     def __repr__(self):
         """Return a string represntation of the compiler toolchain."""
         return self.__str__()
diff --git a/lib/spack/spack/compilers/__init__.py b/lib/spack/spack/compilers/__init__.py
index b7b021a1ac..8c4cb38926 100644
--- a/lib/spack/spack/compilers/__init__.py
+++ b/lib/spack/spack/compilers/__init__.py
@@ -44,6 +44,7 @@
 
 _imported_compilers_module = 'spack.compilers'
 _required_instance_vars = ['cc', 'cxx', 'f77', 'fc']
+_optional_instance_vars = ['module']
 
 _default_order = ['gcc', 'intel', 'pgi', 'clang', 'xlc']
 
@@ -127,11 +128,18 @@ def add_compilers_to_config(scope, *compilers):
     compiler_config_tree = {}
     for compiler in compilers:
         compiler_entry = {}
+
         for c in _required_instance_vars:
             val = getattr(compiler, c)
             if not val:
                 val = "None"
             compiler_entry[c] = val
+
+        for c in _optional_instance_vars:
+            val = getattr(compiler, c)
+            if val:
+                compiler_entry[c] = val
+
         compiler_config_tree[str(compiler.spec)] = compiler_entry
     spack.config.add_to_compiler_config(compiler_config_tree, scope)
 
@@ -220,6 +228,7 @@ def class_for_compiler_name(compiler_name):
 
 
 def all_compiler_types():
+#    return [class_for_compiler_name(c) for c in ['gcc']]
     return [class_for_compiler_name(c) for c in supported_compilers()]
 
 
diff --git a/lib/spack/spack/compilers/clang.py b/lib/spack/spack/compilers/clang.py
index 790901c86e..8d32608ff4 100644
--- a/lib/spack/spack/compilers/clang.py
+++ b/lib/spack/spack/compilers/clang.py
@@ -39,7 +39,7 @@ class Clang(Compiler):
 
 
     @classmethod
-    def default_version(self, comp):
+    def default_version(cls, comp):
         """The '--version' option works for clang compilers.
            Output looks like this::
 
diff --git a/lib/spack/spack/compilers/gcc.py b/lib/spack/spack/compilers/gcc.py
index f0d27d590e..ff0b8889a8 100644
--- a/lib/spack/spack/compilers/gcc.py
+++ b/lib/spack/spack/compilers/gcc.py
@@ -42,6 +42,9 @@ class Gcc(Compiler):
     # MacPorts builds gcc versions with prefixes and -mp-X.Y suffixes.
     suffixes = [r'-mp-\d\.\d']
 
+    PrgEnv = 'gnu'
+    PrgEnv_compiler = 'gcc'
+
     @property
     def cxx11_flag(self):
         if self.version < ver('4.3'):
@@ -56,9 +59,9 @@ def fc_version(cls, fc):
         return get_compiler_version(
             fc, '-dumpversion',
             # older gfortran versions don't have simple dumpversion output.
-            r'(?:GNU Fortran \(GCC\))?(\d+\.\d+(?:\.\d+)?)')
+            r'(?:GNU Fortran \(GCC\))?(\d+\.\d+(?:\.\d+)?)', module)
 
 
     @classmethod
     def f77_version(cls, f77):
-        return cls.fc_version(f77)
+        return cls.fc_version(f77, module)
diff --git a/lib/spack/spack/compilers/intel.py b/lib/spack/spack/compilers/intel.py
index 2a72c4eaea..7c485fe69d 100644
--- a/lib/spack/spack/compilers/intel.py
+++ b/lib/spack/spack/compilers/intel.py
@@ -37,6 +37,9 @@ class Intel(Compiler):
     # Subclasses use possible names of Fortran 90 compiler
     fc_names = ['ifort']
 
+    PrgEnv = 'intel'
+    PrgEnv_compiler = 'intel'
+
     @property
     def cxx11_flag(self):
         if self.version < ver('11.1'):
diff --git a/lib/spack/spack/compilers/pgi.py b/lib/spack/spack/compilers/pgi.py
index d97f24c12e..8f1ed28825 100644
--- a/lib/spack/spack/compilers/pgi.py
+++ b/lib/spack/spack/compilers/pgi.py
@@ -37,6 +37,9 @@ class Pgi(Compiler):
     # Subclasses use possible names of Fortran 90 compiler
     fc_names = ['pgf95', 'pgf90']
 
+    PrgEnv = 'pgi'
+    PrgEnv_compiler = 'pgi'
+
     @classmethod
     def default_version(cls, comp):
         """The '-V' option works for all the PGI compilers.
diff --git a/lib/spack/spack/compilers/xl.py b/lib/spack/spack/compilers/xl.py
index 562186b865..179b720918 100644
--- a/lib/spack/spack/compilers/xl.py
+++ b/lib/spack/spack/compilers/xl.py
@@ -45,8 +45,9 @@ def cxx11_flag(self):
         else:
             return "-qlanglvl=extended0x"
 
+
     @classmethod
-    def default_version(self, comp):
+    def default_version(cls, comp):
         """The '-qversion' is the standard option fo XL compilers.
            Output looks like this::
 
@@ -72,6 +73,7 @@ def default_version(self, comp):
         return get_compiler_version(
             comp, '-qversion',r'([0-9]?[0-9]\.[0-9])')
 
+
     @classmethod
     def fc_version(cls, fc):
         """The fortran and C/C++ versions of the XL compiler are always two units apart.
diff --git a/var/spack/packages/scr/package.py b/var/spack/packages/scr/package.py
index 74b75a8742..9fb758f072 100755
--- a/var/spack/packages/scr/package.py
+++ b/var/spack/packages/scr/package.py
@@ -28,12 +28,14 @@ class Scr(Package):
     """SCR caches checkpoint data in storage on the compute nodes of a
        Linux cluster to provide a fast, scalable checkpoint/restart
        capability for MPI codes"""
+
     homepage = "https://computation.llnl.gov/project/scr/"
-    url      = "http://downloads.sourceforge.net/project/scalablecr/releases/scr-1.1-7.tar.gz"
 
     depends_on("mpi")
+#    depends_on("dtcmp")
 
-    version('1.1-7', 'a5930e9ab27d1b7049447c2fd7734ebd')
+    version('1.1-7', 'a5930e9ab27d1b7049447c2fd7734ebd', url='http://downloads.sourceforge.net/project/scalablecr/releases/scr-1.1-7.tar.gz')
+    version('1.1.8', '6a0f11ad18e27fcfc00a271ff587b06e', url='https://github.com/hpc/scr/releases/download/v1.1.8/scr-1.1.8.tar.gz')
 
     def install(self, spec, prefix):
         configure("--prefix=" + prefix,