explain how to fix if you don't have capnpc-go installed
explain how to fix if you don't have capnpc-go installed

tpukep/caps,hodduc/go-capnproto2,zombiezen/go-capnproto2,zombiezen/go-capnproto,zombiezen/go-capnproto2,hodduc/go-capnproto2,zombiezen/go-capnproto