diff -r eff93bc3c14f -r 4b79e5d3d0aa doc-src/IsarImplementation/IsaMakefile
--- a/doc-src/IsarImplementation/IsaMakefile	Sat Oct 04 16:05:08 2008 +0200
+++ b/doc-src/IsarImplementation/IsaMakefile	Sat Oct 04 16:05:09 2008 +0200
@@ -14,7 +14,7 @@
 OUT = $(ISABELLE_OUTPUT)
 LOG = $(OUT)/log
 
-USEDIR = $(ISATOOL) usedir -v true -i false -d false -C false -D document
+USEDIR = $(ISABELLE_TOOL) usedir -v true -i false -d false -C false -D document
 
 
 ## Thy