diff --git a/.drone.star b/.drone.star
index bdd623c..d1813c1 100644
--- a/.drone.star
+++ b/.drone.star
@@ -25,9 +25,14 @@ def main(ctx):
 
       step_for(ctx, "dinglehopper"),
       step_for(ctx, "ocrd_calamari"),
+      step_for(ctx, "ocrd_calamari03"),
+      step_for(ctx, "ocrd_cis"),
+      step_for(ctx, "ocrd_fileformat"),
       step_for(ctx, "ocrd_olena"),
-      step_for(ctx, "ocrd_tesserocr"),
       step_for(ctx, "ocrd_segment"),
+      step_for(ctx, "ocrd_tesserocr"),
+      step_dor(ctx, "sbb_binarization"),
+      step_dor(ctx, "sbb_textline_detector"),
     ]
   }
 
diff --git a/Dockerfile-ocrd_calamari03 b/Dockerfile-ocrd_calamari03
index 6d4089b..9879891 100644
--- a/Dockerfile-ocrd_calamari03
+++ b/Dockerfile-ocrd_calamari03
@@ -1,4 +1,5 @@
-FROM my_ocrd_workflow-core
+ARG DRONE_COMMIT="latest"
+FROM mikegerber/my_ocrd_workflow-core-cuda10.0:$DRONE_COMMIT
 
 ARG PIP_INSTALL="pip install --no-cache-dir"
 
diff --git a/Dockerfile-ocrd_cis b/Dockerfile-ocrd_cis
index f846251..068a82e 100644
--- a/Dockerfile-ocrd_cis
+++ b/Dockerfile-ocrd_cis
@@ -1,4 +1,5 @@
-FROM my_ocrd_workflow-core
+ARG DRONE_COMMIT="latest"
+FROM mikegerber/my_ocrd_workflow-core:$DRONE_COMMIT
 
 ARG PIP_INSTALL="pip install --no-cache-dir"
 ARG OCRD_CIS_VERSION="0.1.5"
diff --git a/Dockerfile-ocrd_fileformat b/Dockerfile-ocrd_fileformat
index 978531a..d9e8fe4 100644
--- a/Dockerfile-ocrd_fileformat
+++ b/Dockerfile-ocrd_fileformat
@@ -1,4 +1,5 @@
-FROM my_ocrd_workflow-core
+ARG DRONE_COMMIT="latest"
+FROM mikegerber/my_ocrd_workflow-core:$DRONE_COMMIT
 
 ARG PIP_INSTALL="pip install --no-cache-dir"
 # XXX ARG OCRD_FILEFORMAT_VERSION="0.2.0"
diff --git a/Dockerfile-sbb_binarization b/Dockerfile-sbb_binarization
index 5d50ad5..85b35cc 100644
--- a/Dockerfile-sbb_binarization
+++ b/Dockerfile-sbb_binarization
@@ -1,4 +1,5 @@
-FROM my_ocrd_workflow-core
+ARG DRONE_COMMIT="latest"
+FROM mikegerber/my_ocrd_workflow-core-cuda10.0:$DRONE_COMMIT
 
 ARG PIP_INSTALL="pip install --no-cache-dir"
 ARG SBB_BINARIZATION_COMMIT="ea69494"
diff --git a/Dockerfile-sbb_textline_detector b/Dockerfile-sbb_textline_detector
index 1c81809..39daace 100644
--- a/Dockerfile-sbb_textline_detector
+++ b/Dockerfile-sbb_textline_detector
@@ -1,4 +1,5 @@
-FROM my_ocrd_workflow-core-cuda10.0
+ARG DRONE_COMMIT="latest"
+FROM mikegerber/my_ocrd_workflow-core-cuda10.0:$DRONE_COMMIT
 
 ARG PIP_INSTALL="pip install --no-cache-dir"
 ARG SBB_TEXTLINE_DETECTOR_COMMIT="451b71f"
diff --git a/README-DEV.md b/README-DEV.md
index ab648ff..675d7e7 100644
--- a/README-DEV.md
+++ b/README-DEV.md
@@ -1,3 +1,9 @@
+How to add a processor
+----------------------
+* Add a Dockerfile
+* Add to `build`
+* Add to `.drone.star`
+
 Releasing
 ---------
 * `git tag -m 'v<version>' 'v<version>'`