SBT respects the usual environment variables for http/https proxy settings:Set the below environment variables before invoking SBT and it should work.SET JVM_OPTS=-Dhttp.proxyHost= -Dhttp.proxyPort= -Dhttps.proxyHost= -Dhttps.proxyPort=SET JAVA_OPTS=-Dhttp.proxyHost= -Dhttp.proxyPort= -Dhttps.proxyHost= -Dhttps.proxyPort=If you have username / password for your proxy authentication, then