diff --git a/var/spack/repos/builtin/packages/llvm/package.py b/var/spack/repos/builtin/packages/llvm/package.py
index 87b598263c..97c4a57b2c 100644
--- a/var/spack/repos/builtin/packages/llvm/package.py
+++ b/var/spack/repos/builtin/packages/llvm/package.py
@@ -334,8 +334,10 @@ def cmake_args(self):
             gcc_prefix = ancestor(self.compiler.cc, 2)
             cmake_args.append('-DGCC_INSTALL_PREFIX=' + gcc_prefix)
 
-        if spec.satisfies('@4.0.0:') and spec.satisfies('platform=linux'):
-            cmake_args.append('-DCMAKE_BUILD_WITH_INSTALL_RPATH=1')
+        if spec.satisfies('@4.0.0:'):
+            if spec.satisfies('platform=cray') or \
+               spec.satisfies('platform=linux'):
+                cmake_args.append('-DCMAKE_BUILD_WITH_INSTALL_RPATH=1')
 
         if '+flang' not in spec:
             # Semicolon seperated list of projects to enable