kc3-lang/libffi

diff --git a/.travis/install.sh b/.travis/install.sh
index ab58b2b..0372b44 100755
--- a/.travis/install.sh
+++ b/.travis/install.sh
@@ -15,6 +15,7 @@ else
 	;;
     moxie-elf)
 	echo 'deb http://repos.moxielogic.org:7114/MoxieLogic moxiedev main' | sudo tee -a /etc/apt/sources.list
+	sudo apt-get clean # clear the cache
 	sudo apt-get update ## -qq
 	# debug...
 	curl http://repos.moxielogic.org:7114/MoxieLogic/dists/moxiedev/main/binary-amd64/Packages