is everithing allright with makefile?

[misaqsaadat]

Hello. I am new in using makefile and in golang.
I want to use this library for test something.
I cloned project and run "make" command on root.
but I got this error:
--> Building Protocol Buffers
Generating message.pb.go
/bin/sh: 3: protoc: not found
Generating signature.pb.go
/bin/sh: 3: protoc: not found
Generating ecdsa-keygen.pb.go
/bin/sh: 3: protoc: not found
Generating ecdsa-signing.pb.go
/bin/sh: 3: protoc: not found
Generating ecdsa-resharing.pb.go
/bin/sh: 3: protoc: not found
Generating eddsa-keygen.pb.go
/bin/sh: 3: protoc: not found
Generating eddsa-signing.pb.go
/bin/sh: 3: protoc: not found
Generating eddsa-resharing.pb.go
/bin/sh: 3: protoc: not found
make: *** [Makefile:11: protob] Error 127

I am new in using make file. so that might be my problem. what should I do?