diff --git a/build.sh b/build.sh
index d2a0aaca9d984f53af47313142b820fe262071f0..b319890d40b5627f7995d3109313564a497201c7 100755
--- a/build.sh
+++ b/build.sh
@@ -58,7 +58,7 @@ check_prerequisites()
 	echo "Checking prerequisites..." | tee -a $LOGFILE
 	
 	# required toolchain
-	TOOLS="automake autoconf m4 cmake wget gcc g++ ld libtool ar lex yacc"
+	TOOLS="automake autoconf m4 cmake wget svn cvs tar gcc g++ ld libtool ar lex yacc"
 
 	for tool in $TOOLS; do
 		if ! ( type $tool >/dev/null 2>&1 ); then