--- a/common/autoconf/libraries.m4	Tue Jun 07 22:01:49 2016 -0400
+++ b/common/autoconf/libraries.m4	Fri Jun 10 15:19:32 2016 -0700
@@ -122,7 +122,7 @@
         fi
       fi
     done
-    llvm_version=$("${LLVM_CONFIG}" --version | sed 's/\.//; s/svn.*//')
+    llvm_version=$("${LLVM_CONFIG}" --version | $SED 's/\.//; s/svn.*//')
     LLVM_CFLAGS="${LLVM_CFLAGS} -DSHARK_LLVM_VERSION=${llvm_version}"
 
     unset LLVM_LDFLAGS