Deserialize the protobuf message in AirFlow

Question

As I understood correctly, to deserialize the protobuf message, I have to generate a special python class using the command protoc -I=$SRC_DIR --python_out=$DST_DIR $SRC_DIR/scheme.proto (https://developers.google.com/protocol - buffers/documents/pythontutorial).

But how can I do it in AirFlow? Let's say I'm just a user and don't have access to execute a command on the command line.

And an even deeper question, how do I do this in AirFlow on AWS? We install a new python package via a text file by simply adding a new line with the package and version. If I create a package anywhere with a python class from a .proto file - how can I install it on AWS?