Index: /issm/trunk/externalpackages/boost/install.sh
===================================================================
--- /issm/trunk/externalpackages/boost/install.sh	(revision 10144)
+++ /issm/trunk/externalpackages/boost/install.sh	(revision 10145)
@@ -28,3 +28,8 @@
 
 #Compile boost
-./bjam -j$NUMCPUS install
+if [ -z $NUMCPUS ];
+then
+	./bjam install
+else
+	./bjam -j$NUMCPUS install
+fi