Im trying to make project that will share .proto contracts across multiple services. Currently I have made a example contract project: 4.0.0 com.example grpc_contract 1.0-SNAPSHOT 25 25 UTF-8 src/main/proto */.proto With one .proto file: src/main/proto/hello.proto . I tried to include this in client project like this: com.example grpc_contract 1.0-SNAPSHOT But during the project installation none sources from .proto files are generated.