diff --git a/Makefile b/Makefile
index 36892fb5f..c59244636 100644
--- a/Makefile
+++ b/Makefile
@@ -100,7 +100,7 @@ tests: $(SCOPE_BACKEND_BUILD_UPTODATE)
 	./tools/test -no-go-get
 
 lint: $(SCOPE_BACKEND_BUILD_UPTODATE)
-	./tools/lint .
+	./tools/lint -ignorespelling "agre " -ignorespelling "AGRE " .
 
 prog/static.go: $(SCOPE_BACKEND_BUILD_UPTODATE)
 	esc -o $@ -prefix client/build client/build
diff --git a/backend/Dockerfile b/backend/Dockerfile
index 566bb049e..b323a7128 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -1,10 +1,11 @@
 FROM golang:1.6.0
-RUN apt-get update && apt-get install -y libpcap-dev python-requests time
+RUN apt-get update && apt-get install -y libpcap-dev python-requests time file
 RUN go clean -i net && go install -tags netgo std &&  go install -race -tags netgo std
 RUN go get -tags netgo \
 		github.com/fzipp/gocyclo \
 		github.com/golang/lint/golint \
 		github.com/kisielk/errcheck \
-		github.com/mjibson/esc
+		github.com/mjibson/esc \
+		github.com/client9/misspell/cmd/misspell
 COPY build.sh /
 ENTRYPOINT ["/build.sh"]