diff --git a/Jenkinsfile b/Jenkinsfile
index 9be39e5..f49993d 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -34,6 +34,7 @@ node {
 		_envmap["${_n}"] = "${_v}";
 	}
 	sh "mkdir -p ${rel_dir}"
+	sh "rm -rvf ${rel_dir}/* | true"
 	def _msg = "Built images:"
 	def platforms = ['debian', 'osx', 'windows', 'windows32', 'android', 'pi', 'ubuntu']
 	for (int i = 0; i < platforms.size(); ++i) {