diff --git a/pkg/format/Dockerfile b/pkg/format/Dockerfile
index 5abe9f847..b3f24a566 100644
--- a/pkg/format/Dockerfile
+++ b/pkg/format/Dockerfile
@@ -18,7 +18,7 @@ RUN rm -rf /out/etc/apk /out/lib/apk /out/var/cache
 FROM linuxkit/alpine:33063834cf72d563cd8703467836aaa2f2b5a300 AS build
 
 RUN apk add --no-cache go musl-dev
-ENV GOPATH=/go PATH=$PATH:/go/bin GO111MODULE=off
+ENV GOPATH=/go PATH=$PATH:/go/bin
 # Hack to work around an issue with go on arm64 requiring gcc
 RUN [ $(uname -m) = aarch64 ] && apk add --no-cache gcc || true
 
diff --git a/pkg/format/go.mod b/pkg/format/go.mod
new file mode 100644
index 000000000..1d11d0bc1
--- /dev/null
+++ b/pkg/format/go.mod
@@ -0,0 +1,3 @@
+module github.com/linuxkit/linuxkit/pkg/format
+
+go 1.15