We are currently using the jethro branch for OpenEmbedded which has 0.12.7 version of nodejs and 0.12.2 version is available in feeds. To get a more recent version of nodejs, there is a meta-nodejs layer which you can try to add to OpenEmbedded setup and then try building the more recent version. However this has not been tested. Also note the information on Stack Overflow.
Alternatively once we switch to krogoth, 4.4.3 should be available, however it has not been decided if and when we switch to it.