To build the `containerd` daemon, and the `ctr` simple test client, the following build system dependencies are required:

* Protoc 3.x compiler and headers (download at the [Google protobuf releases page](https://github.com/protocolbuffers/protobuf/releases))

* Btrfs headers and libraries for your distribution. Note that building the btrfs driver can be disabled via the build tag `no_btrfs`, removing this dependency.