diff --git a/Dockerfile b/Dockerfile
index d5965f6..15b969b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,7 +13,7 @@ FROM golang@sha256:52a48e0239f4d645b20ac268a60361703afe7feb2df5697fa89f72052cb87
 #FROM golang:1.16-buster AS builder
 
 ENV DEBIAN_FRONTEND noninteractive
-RUN apt update && apt install -y make bzip2
+RUN apt update && apt install -y make bzip2 protobuf-compiler
 
 RUN mkdir -p /build
 WORKDIR /build
diff --git a/Makefile b/Makefile
index 8e17306..fa1ac4e 100644
--- a/Makefile
+++ b/Makefile
@@ -24,6 +24,10 @@ devprereqs:
 	which golangci-lint || go install -v github.com/golangci/golangci-lint/cmd/golangci-lint@latest
 
 mfer: $(PROTOC_GEN_GO) src/*.go cmd/*/*.go
+	-echo PATH is $(PATH)
+	-find $(GOPATH)
+	-echo GOPATH/bin contents:
+	-find $(GOPATH)/bin
 	cd proto && go generate .
 	cd cmd/mfer && go build -o ../../mfer $(GOFLAGS) .