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+## Building ##
+
+OpenBMC uses Yocto/Open-Embedded for a build system, which supports an 
+out-of-tree build.  It is recommended that you create an empty directory
+somewhere to hold the build.  This directory will get big.
+
+To start a build:
+
+    cd <builddir>
+    . <repodir>/openbmc-env
+    bitbake obmc-phosphor-image
+