diff -Nurp VirtualBox-4.1.8_OSE-p5/configure VirtualBox-4.1.8_OSE-p9/configure
--- VirtualBox-4.1.8_OSE-p5/configure	2011-12-24 15:18:03.271635525 +0200
+++ VirtualBox-4.1.8_OSE-p9/configure	2011-12-24 15:42:37.404156620 +0200
@@ -2549,7 +2549,7 @@ check_gcc
 # don't check for yasm for the time beeing as 0.40 and 0.50 both have known bugs
 # [ "$OS" != "darwin" ] && check_yasm
 [ "$OS" != "darwin"  ] && check_xsltproc
-[ "$OS" != "darwin"  ] && check_mkisofs
+#[ "$OS" != "darwin"  ] && check_mkisofs
 
 # the libraries
 [ "$OS" != "darwin"  ] && check_pthread
@@ -2607,7 +2607,7 @@ if [ "$OS" = "linux" ]; then
   check_compiler_h
   [ "$BUILD_MACHINE" = "amd64" -a $WITH_VMMRAW -eq 1 ] && check_32bit
   # tools/common/makeself*
-  [ $OSE -ge 1 ] && check_makeself
+ # [ $OSE -ge 1 ] && check_makeself
 fi
 
 [ -n "$SETUP_WINE" ] && setup_wine