diff --git a/Jenkinsfile b/Jenkinsfile
index e5fce0c..bc3a472 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -1,7 +1,22 @@
 node("linux && amd64 && docker") {
-  docker.image("icedream/freetz:2.0").inside {
+  docker.image("icedream/freetz@sha256:6607702228ee9ee819d888702acf3ddefe7609132f7f15c88349251a15f5a5cc").inside {
+    def workspace = pwd()
     checkout scm
-    sh "make"
-    archive "images/**,outboard/**"
+
+    sh """
+    cd /freetz
+    cp \"${workspace}\"/.config \
+      \"${workspace}\"/.dynamic \
+      \"${workspace}\"/.packages \
+      \"${workspace}\"/.static \
+      .
+    chown freetz:freetz .config .dynamic .packages .static
+
+    su freetz -c \"sh -c 'umask 0022 && make oldconfig && make'\"
+    """
+
+    dir("/freetz") {
+      archive "images/**,outboard/**"
+    }
   }
 }