Downlaod source from https://wso2.org/repos/wso2/branches/carbon-platform/2.0 and build WSS4J/Axis2/Transports/Sandesha2/Savan/Rampart/Synapse in the given order.
mvn clean install
Download source for carbon-orbit from https://wso2.org/repos/wso2/trunk/carbon-orbit;
mvn clean install
Download source for carbon-core from https://wso2.org/repos/wso2/trunk/carbon;
mvn clean install
Download source for carbon-components from https://wso2.org/repos/wso2/trunk/carbon-components;
mvn clean install -Dproduct=is
Download source for Identity Server product from https://wso2.org/repos/wso2/trunk/solutions/identity;
mvn clean install
You can find the binary distribution at [https://wso2.org/repos/wso2/trunk/solutions/identity]/modules/distribution/target