diff --git a/.travis.yml b/.travis.yml
index a72bf8f11c..75a746dfb8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -213,6 +213,7 @@ after_success:
           PACKAGE_NAME="ponyc-$TRAVIS_BRANCH";
           PACKAGE_CONFLICTS="ponyc-release";
       fi;
+      make clean config=release;
       PACKAGE_ITERATION="${PACKAGE_ITERATION}${TRAVIS_BUILD_NUMBER}.`git rev-parse --short --verify HEAD^{commit}`";
       make verbose=1 arch=x86-64 config=release package_name="$PACKAGE_NAME" package_conflicts="$PACKAGE_CONFLICTS" package_base_version="`cat VERSION`" package_iteration="$PACKAGE_ITERATION" deploy && export UPLOAD=yes;
     fi;