--- makepkg.sh.in	2008-01-27 20:10:18.000000000 -0700
+++ makepkg.sh.in.new	2008-01-27 20:10:44.000000000 -0700
@@ -997,21 +997,39 @@
 		# number to avoid having to determine the version number twice.
 		oldpkgver=$pkgver
 		if [ ! -z ${_darcstrunk} ] && [ ! -z ${_darcsmod} ] ; then
+			if ! type darcs >/dev/null 2>&1; then
+				return
+			fi
 			msg "$(gettext "Determining latest darcs revision...")"
 			newpkgver=$(date +%Y%m%d)
 		elif [ ! -z ${_cvsroot} ] && [ ! -z ${_cvsmod} ] ; then
+			if ! type cvs >/dev/null 2>&1; then
+				return
+			fi
 			msg "$(gettext "Determining latest cvs revision...")"
 			newpkgver=$(date +%Y%m%d)
 		elif [ ! -z ${_gitroot} ] && [ ! -z ${_gitname} ] ; then
+			if ! type git >/dev/null 2>&1; then
+				return
+			fi
 			msg "$(gettext "Determining latest git revision...")"
 			newpkgver=$(date +%Y%m%d)
 		elif [ ! -z ${_svntrunk} ] && [ ! -z ${_svnmod} ] ; then
+			if ! type svn >/dev/null 2>&1; then
+				return
+			fi
 			msg "$(gettext "Determining latest svn revision...")"
 			newpkgver=$(svn log $_svntrunk --limit 1 -q | sed -n 's/^r\([0-9]*\) .*$/\1/p')
 		elif [ ! -z ${_bzrtrunk} ] && [ ! -z ${_bzrmod} ] ; then
+			if ! type bzr >/dev/null 2>&1; then
+				return
+			fi
 			msg "$(gettext "Determining latest bzr revision...")"
 			newpkgver=$(bzr revno ${_bzrtrunk})
 		elif [ ! -z ${_hgroot} ] && [ ! -z ${_hgrepo} ] ; then
+			if ! type hg >/dev/null 2>&1; then
+				return
+			fi
 			msg "$(gettext "Determining latest hg revision...")"
 			if [ -d ./src/$_hgrepo ] ; then
 				cd ./src/$_hgrepo