diff --git a/README.md b/README.md
index 5f7969b2..4de39d4f 100644
--- a/README.md
+++ b/README.md
@@ -430,6 +430,7 @@ These are the data sources used for download config from cloud provider. The val
     packet
     scaleway
     vultr
+    hetzner
     cdrom
 
 More than one can be supported at a time, for example:
@@ -441,6 +442,8 @@ k3os:
   - cdrom
 ```
 
+When multiple data sources are specified they are probed in order and the first to provide `/run/config/userdata` will halt further processing.
+
 ### `k3os.modules`
 
 A list of kernel modules to be loaded on start.
diff --git a/images/02-progs/Dockerfile b/images/02-progs/Dockerfile
index 952afe44..e926fcfd 100644
--- a/images/02-progs/Dockerfile
+++ b/images/02-progs/Dockerfile
@@ -3,11 +3,12 @@ ARG TAG
 ARG VERSION
 FROM ${REPO}/k3os-gobuild:${TAG} as gobuild
 
-ENV LINUXKIT v0.7
+ENV LINUXKIT 3f56669576bac1a44cd61f5a9fa540976d33eeed
 
 FROM gobuild as linuxkit
-RUN git clone --branch $LINUXKIT https://github.com/linuxkit/linuxkit.git $GOPATH/src/github.com/linuxkit/linuxkit
+RUN git clone https://github.com/linuxkit/linuxkit.git $GOPATH/src/github.com/linuxkit/linuxkit
 WORKDIR $GOPATH/src/github.com/linuxkit/linuxkit/pkg/metadata
+RUN git checkout -b current $LINUXKIT
 RUN gobuild -o /output/metadata
 
 FROM gobuild as k3os