define a variable to specify the mkhowto program itself, as for any
other application
diff --git a/Doc/Makefile b/Doc/Makefile
index b15dbad..3fae30b 100644
--- a/Doc/Makefile
+++ b/Doc/Makefile
@@ -71,19 +71,21 @@
PYTHON= python
DVIPS= dvips -N0 -t $(PAPER)
-MKDVI= $(PYTHON) ../tools/mkhowto --paper=$(PAPER) --dvi
-MKHTML= $(PYTHON) tools/mkhowto --html --about html/stdabout.dat \
+MKHOWTO= $(PYTHON) ../tools/mkhowto
+
+MKDVI= $(MKHOWTO) --paper=$(PAPER) --dvi
+MKHTML= $(MKHOWTO) --html --about html/stdabout.dat \
--iconserver ../icons --favicon ../icons/pyfav.gif \
--address $(PYTHONDOCS) --up-link ../index.html \
--up-title "Python Documentation Index" \
--global-module-index "../modindex.html" --dvips-safe
-MKISILOHTML=$(PYTHON) tools/mkhowto --html --about html/stdabout.dat \
+MKISILOHTML=$(MKHOWTO) --html --about html/stdabout.dat \
--iconserver ../icons \
--l2h-init perl/isilo.perl --numeric --split 1 \
--dvips-safe
MKISILO= iSilo386 -U -y -rCR -d0
-MKPDF= $(PYTHON) ../tools/mkhowto --paper=$(PAPER) --pdf
-MKPS= $(PYTHON) ../tools/mkhowto --paper=$(PAPER) --ps
+MKPDF= $(MKHOWTO) --paper=$(PAPER) --pdf
+MKPS= $(MKHOWTO) --paper=$(PAPER) --ps
BUILDINDEX=$(TOOLSDIR)/buildindex.py