diff --git a/Demos/CcdPhysicsDemo/ibmsdk/Makefile b/Demos/CcdPhysicsDemo/ibmsdk/Makefile
index cd0f452f1..c92fc0374 100755
--- a/Demos/CcdPhysicsDemo/ibmsdk/Makefile
+++ b/Demos/CcdPhysicsDemo/ibmsdk/Makefile
@@ -50,11 +50,9 @@ INSTALL_FILES   = $(PROGRAM_ppu)
 #                       make.footer
 ########################################################################
 
-ifdef CELL_TOP
-	include $(CELL_TOP)/make.footer
-else
-	include ../../../make.footer
-endif
+CELL_TOP ?= /opt/ibm/cell-sdk/prototype
+
+include $(CELL_TOP)/make.footer
 
 $(PPMS): 
 	cp textures/$@ .
diff --git a/Demos/CollisionDemo/ibmsdk/Makefile b/Demos/CollisionDemo/ibmsdk/Makefile
index 7403160fe..67cd72830 100755
--- a/Demos/CollisionDemo/ibmsdk/Makefile
+++ b/Demos/CollisionDemo/ibmsdk/Makefile
@@ -50,11 +50,9 @@ INSTALL_FILES   = $(PROGRAM_ppu)
 #                       make.footer
 ########################################################################
 
-ifdef CELL_TOP
-	include $(CELL_TOP)/make.footer
-else
-	include ../../../make.footer
-endif
+CELL_TOP ?= /opt/ibm/cell-sdk/prototype
+
+include $(CELL_TOP)/make.footer
 
 $(PPMS): 
 	cp textures/$@ .
diff --git a/Demos/OpenGL/ibmsdk/Makefile b/Demos/OpenGL/ibmsdk/Makefile
index 1279af9e9..942e803b6 100644
--- a/Demos/OpenGL/ibmsdk/Makefile
+++ b/Demos/OpenGL/ibmsdk/Makefile
@@ -32,5 +32,5 @@ RenderTexture.o
 #### Install directories
 INSTALL_DIR	= $(ROOT)/lib/ibmsdk/
 INSTALL_FILES	= $(LIBRARY)
-CELL_TOP ?= $(ROOT)
+CELL_TOP ?= /opt/ibm/cell-sdk/prototype
 include $(CELL_TOP)/make.footer
diff --git a/src/BulletCollision/ibmsdk/Makefile b/src/BulletCollision/ibmsdk/Makefile
index 017168ce1..abe77c004 100644
--- a/src/BulletCollision/ibmsdk/Makefile
+++ b/src/BulletCollision/ibmsdk/Makefile
@@ -89,5 +89,5 @@ btUniformScalingShape.o
 #### Install directories
 INSTALL_DIR	= $(ROOT)/lib/ibmsdk
 INSTALL_FILES	= $(LIBRARY_ppu)
-CELL_TOP ?= $(ROOT)
+CELL_TOP ?= /opt/ibm/cell-sdk/prototype
 include $(CELL_TOP)/make.footer
diff --git a/src/BulletDynamics/ibmsdk/Makefile b/src/BulletDynamics/ibmsdk/Makefile
index 048947647..7d55e1342 100644
--- a/src/BulletDynamics/ibmsdk/Makefile
+++ b/src/BulletDynamics/ibmsdk/Makefile
@@ -39,6 +39,6 @@ btWheelInfo.o
 #### Install directories 
 INSTALL_DIR	=  $(ROOT)/lib/ibmsdk
 INSTALL_FILES	= $(LIBRARY_ppu)
-CELL_TOP ?= $(ROOT)
+CELL_TOP ?= /opt/ibm/cell-sdk/prototype
 
 include $(CELL_TOP)/make.footer
diff --git a/src/LinearMath/ibmsdk/Makefile b/src/LinearMath/ibmsdk/Makefile
index 634d1677b..0114f2634 100644
--- a/src/LinearMath/ibmsdk/Makefile
+++ b/src/LinearMath/ibmsdk/Makefile
@@ -25,5 +25,5 @@ btQuickprof.o
 #### Install directories
 INSTALL_DIR	=  $(ROOT)/lib/ibmsdk
 INSTALL_FILES	= $(LIBRARY_ppu)
-CELL_TOP ?= $(ROOT)
+CELL_TOP ?= /opt/ibm/cell-sdk/prototype
 include $(CELL_TOP)/make.footer
diff --git a/src/ibmsdk/Makefile b/src/ibmsdk/Makefile
index 6f52613c2..d8a85bda2 100644
--- a/src/ibmsdk/Makefile
+++ b/src/ibmsdk/Makefile
@@ -1,5 +1,5 @@
 #### Visit Bullet library ibmsdk dirs and build  code
-CELL_TOP ?= ../..
+CELL_TOP ?= /opt/ibm/cell-sdk/prototype
 
 DIRS :=					\
 ../BulletCollision/ibmsdk		\