diff --git a/deploy_tool/main.cpp b/deploy_tool/main.cpp
index b2ad7dc..4966d73 100644
--- a/deploy_tool/main.cpp
+++ b/deploy_tool/main.cpp
@@ -281,7 +281,7 @@ void procQt() {
 
 
 void procDpkg(const PIString & l) {
-	PIString vs, cmd = dpkg + " -S " + l;
+	PIString vs, cmd = dpkg + " -S " + l + " 2> /dev/null";
 	FILE * fp = popen(cmd.dataAscii(), "r");
 	if (fp) {
 		const int sz = 256;
@@ -343,6 +343,8 @@ int main(int argc, char * argv[]) {
 	objdump = cli.argumentValue("Wobjdump");
 	otool = cli.argumentValue("Motool");
 	dpkg = cli.argumentValue("Dpkg");
+	if (dpkg.isEmpty())
+		dpkg = "/usr/bin/dpkg";
 	out_plugins_dir = out_dir + "plugins/";
 	if (!cli.argumentValue("pqt_out_plugins").isEmpty()) {
 		out_plugins_dir = cli.argumentValue("pqt_out_plugins");