diff --git a/Makefile b/Makefile
index 4e7a830..9450450 100644
--- a/Makefile
+++ b/Makefile
@@ -35,8 +35,9 @@ all: tools.mk docs libemile libblock libiso9660 libiso9660-m68k libgzip-m68k \
      libconfig libconfig-m68k \
      second/$(KARCH)-linux-all/second second/m68k-linux-scsi-driver/apple_driver
 
-tools.mk: scripts/tools.sh
-	sh scripts/tools.sh > $@
+tools.mk:
+	@echo "Please run ./configure"
+	@false
 
 ALL_BIN = cdboot-sarge.bin cdboot-woody.bin cdboot-etch.bin
 
diff --git a/scripts/tools.sh b/configure
old mode 100644
new mode 100755
similarity index 68%
rename from scripts/tools.sh
rename to configure
index b76e35b..9bbdd10
--- a/scripts/tools.sh
+++ b/configure
@@ -13,7 +13,35 @@ WHERE=$(hostname)
 ARCH=$(uname -m)
 OS=$(uname -o)
 
-cat <<!EOF
+if test "${ARCH}" != "m68k" ; then
+	M68K_CROSS_COMPILE=${M68K_CROSS_COMPILE:-m68k-linux-}
+	if ! type "${M68K_CROSS_COMPILE}${CC}" > /dev/null 2>&1
+	then
+		M68K_CROSS_COMPILE=m68k-linux-gnu-
+		if ! type "${M68K_CROSS_COMPILE}${CC}" > /dev/null 2>&1
+		then
+			echo "Cannot find m68k cross-compiler" 1>&2
+			unset M68K_CROSS_COMPILE
+		fi
+	fi
+fi
+
+if test "${ARCH}" != "ppc" ; then
+	PPC_CROSS_COMPILE=${PPC_CROSS_COMPILE:-powerpc-linux-}
+	if ! type "${PPC_CROSS_COMPILE}${CC}" > /dev/null 2>&1
+	then
+		PPC_CROSS_COMPILE=powerpc-linux-gnu-
+		if ! type "${PPC_CROSS_COMPILE}${CC}" > /dev/null 2>&1
+		then
+			echo "Cannot find powerpc cross-compiler" 1>&2
+			unset PPC_CROSS_COMPILE
+		fi
+	fi
+fi
+
+exec 5> tools.mk.tmp
+
+cat 1>&5 <<!EOF
 # file generated by $0
 
 WHEN			= \$(shell LANG=C date)
@@ -23,26 +51,6 @@ ARCH			= ${ARCH}
 OS			= ${OS}
 
 SIGNATURE = \$(PACKAGE)-\$(VERSION) \$(WHO)@\$(WHERE)(\$(ARCH) \$(OS)) \$(WHEN)
-!EOF
-
-# m68k cross-compiler
-
-if test "${ARCH}" != "m68k"
-then
-	M68K_CROSS_COMPILE=m68k-linux-
-	if ! type "${M68K_CROSS_COMPILE}${CC}" > /dev/null 2>&1
-	then
-		M68K_CROSS_COMPILE=m68k-linux-gnu-
-		if ! type "${M68K_CROSS_COMPILE}${CC}" > /dev/null 2>&1
-		then
-			echo "Cannot find m68k cross-compiler" 1>&2
-		fi
-	fi
-	M68K_GCC_VERSION=$(${M68K_CROSS_COMPILE}${CC} -dumpversion 2> /dev/null)
-	echo "cross-compiler is ${M68K_CROSS_COMPILE}${CC} ${M68K_GCC_VERSION}" 1>&2
-fi
-
-cat <<!EOF
 
 M68K_CROSS_COMPILE = ${M68K_CROSS_COMPILE}
 
@@ -53,35 +61,29 @@ M68K_OBJCOPY		= \$(M68K_CROSS_COMPILE)${OBJCOPY}
 M68K_STRIP		= \$(M68K_CROSS_COMPILE)${STRIP}
 !EOF
 
-if test "${ARCH}" != "ppc"
-then
-	PPC_CROSS_COMPILE=powerpc-linux-
-	if ! type "${PPC_CROSS_COMPILE}${CC}" > /dev/null 2>&1
-	then
-		PPC_CROSS_COMPILE=powerpc-linux-gnu-
-		if ! type "${PPC_CROSS_COMPILE}${CC}" > /dev/null 2>&1
-		then
-			echo "Cannot find powerpc cross-compiler" 1>&2
-		else
-			PPC_GCC_VERSION=$(${PPC_CROSS_COMPILE}${CC} -dumpversion 2> /dev/null)
-			echo "cross-compiler is ${PPC_CROSS_COMPILE}${CC} ${PPC_GCC_VERSION}" 1>&2
-cat <<!EOF
+if [ "${M68K_CROSS_COMPILE}" != "" ] ; then
+	M68K_GCC_VERSION=$(${M68K_CROSS_COMPILE}${CC} -dumpversion 2> /dev/null)
+	echo "cross-compiler is ${M68K_CROSS_COMPILE}${CC} ${M68K_GCC_VERSION}" 1>&2
+fi
 
+if [ "${PPC_CROSS_COMPILE}" != "" ] ; then
+	PPC_GCC_VERSION=$(${PPC_CROSS_COMPILE}${CC} -dumpversion 2> /dev/null)
+	echo "cross-compiler is ${PPC_CROSS_COMPILE}${CC} ${PPC_GCC_VERSION}" 1>&2
+cat 1>&5 <<!EOF
 PPC_CROSS_COMPILE = ${PPC_CROSS_COMPILE}
 
-PPC_AS		= \$(PPC_CROSS_COMPILE)${AS}
-PPC_CC		= \$(PPC_CROSS_COMPILE)${CC}
-PPC_LD		= \$(PPC_CROSS_COMPILE)${LD}
-PPC_OBJCOPY	= \$(PPC_CROSS_COMPILE)${OBJCOPY}
-PPC_STRIP	= \$(PPC_CROSS_COMPILE)${STRIP}
+PPC_AS			= \$(PPC_CROSS_COMPILE)${AS}
+PPC_CC			= \$(PPC_CROSS_COMPILE)${CC}
+PPC_LD			= \$(PPC_CROSS_COMPILE)${LD}
+PPC_OBJCOPY		= \$(PPC_CROSS_COMPILE)${OBJCOPY}
+PPC_STRIP		= \$(PPC_CROSS_COMPILE)${STRIP}
 !EOF
-		fi
-	fi
+
 fi
 
 # target compiler
 
-cat <<!EOF
+cat 1>&5 <<!EOF
 
 ifeq (\$(TARGET),m68k-linux)
 
@@ -101,9 +103,8 @@ override STRIP		= \$(M68K_STRIP)
 
 !EOF
 
-if type "${PPC_CROSS_COMPILE}${CC}" > /dev/null 2>&1
-then
-cat <<!EOF
+if [ "${PPC_GCC_VERSION}" != "" ] ; then
+cat 1>&5 <<!EOF
 else ifeq (\$(TARGET),ppc-linux)
 
 override AS		= \$(M68K_AS)
@@ -115,23 +116,24 @@ override STRIP		= \$(M68K_STRIP)
 !EOF
 fi
 
-cat <<!EOF
+cat 1>&5 <<!EOF
 else
 
-AS		= \$(CROSS_COMPILE)${AS}
-CC		= \$(CROSS_COMPILE)${CC}
-LD		= \$(CROSS_COMPILE)${LD}
-OBJCOPY		= \$(CROSS_COMPILE)${OBJCOPY}
-STRIP		= \$(CROSS_COMPILE)${STRIP}
+AS			= \$(CROSS_COMPILE)${AS}
+CC			= \$(CROSS_COMPILE)${CC}
+LD			= \$(CROSS_COMPILE)${LD}
+OBJCOPY			= \$(CROSS_COMPILE)${OBJCOPY}
+STRIP			= \$(CROSS_COMPILE)${STRIP}
 
 endif
 !EOF
 
+
 # docbook to man
 
 if type docbook-to-man > /dev/null 2>&1
 then
-cat <<!EOF
+cat 1>&5 <<!EOF
  
 %.5: %.sgml
 	docbook-to-man \$< > \$@
@@ -142,7 +144,7 @@ cat <<!EOF
 else
 if type docbook2man > /dev/null 2>&1
 then
-cat <<!EOF
+cat 1>&5 <<!EOF
 
 %.5: %.sgml
 	docbook2man \$< > \$@
@@ -151,8 +153,8 @@ cat <<!EOF
 	docbook2man \$< > \$@
 !EOF
 else
- 
-cat <<!EOF
+
+cat 1>&5 <<!EOF
 %.5: %.sgml
 	@echo "Missing tools to generate \$@ from \$<" >&2 && false
  
@@ -161,3 +163,5 @@ cat <<!EOF
 !EOF
 fi
 fi
+
+mv tools.mk.tmp tools.mk
diff --git a/debian/rules b/debian/rules
index b2c93d9..2b80dcd 100755
--- a/debian/rules
+++ b/debian/rules
@@ -35,7 +35,8 @@ build: build-stamp
 build-stamp:
 	dh_testdir
 	# Add here commands to compile the package.
-	$(MAKE) M68K_CROSS_COMPILE="$(M68K_CROSS_COMPILE)" CROSS_COMPILE="$(CROSS_COMPILE)" $(target)
+	M68K_CROSS_COMPILE="$(M68K_CROSS_COMPILE)" ./configure
+	$(MAKE) CROSS_COMPILE="$(CROSS_COMPILE)" $(target)
 	touch build-stamp
 
 clean: