I have small project made in symfony2 when I try to build it on my server it\'s always fails when unzipping symfony. Build was OK and suddenly composer won\'t unzip symfony
try composer update/install -o -vvv and check wether the package is being loaded from composer's cache.
if yes try clearing composer's cache or try adding -cache-dir=/dev/null.
To force downloading an archive instead of cloning sources, use the --prefer-dist option in combination with --no-dev.
Otherwise you could try raising composer's process timeout value:
export COMPOSER_PROCESS_TIMEOUT=600 ( defaults to 300 )