diff --git a/docs/docker.rst b/docs/docker.rst
index d277867..bd10b85 100644
--- a/docs/docker.rst
+++ b/docs/docker.rst
@@ -1,78 +1,79 @@
 Graph Docker environment
 ========================
 
 
 Build
 -----
 
 .. code:: bash
 
     $ git clone https://forge.softwareheritage.org/source/swh-graph.git
     $ cd swh-graph
     $ docker build --tag swh-graph dockerfiles
 
 
 Run
 ---
 
 Given a graph ``g`` specified by:
 
 - ``g.edges.csv.gz``: gzip-compressed csv file with one edge per line, as a
   "SRC_ID SPACE DST_ID" string, where identifiers are the
   :ref:`persistent-identifiers` of each node.
 - ``g.nodes.csv.gz``: sorted list of unique node identifiers appearing in the
   corresponding ``g.edges.csv.gz`` file. The format is a gzip-compressed csv
   file with one persistent identifier per line.
 
 .. code:: bash
 
     $ docker run -ti \
         --volume /PATH/TO/GRAPH/:/srv/softwareheritage/graph/data \
         --publish 127.0.0.1:5009:5009 \
         swh-graph:latest \
-	bash
+        bash
 
 Where ``/PATH/TO/GRAPH`` is a directory containing the ``g.edges.csv.gz`` and
 ``g.nodes.csv.gz`` files.  By default, when entering the container the current
 working directory will be ``/srv/softwareheritage/graph``; all relative paths
 found below are intended to be relative to that dir.
 
 
 Graph compression
 ~~~~~~~~~~~~~~~~~
 
 To compress the graph:
 
 .. code:: bash
 
     $ app/scripts/compress_graph.sh --lib lib/ --input data/g
 
 Warning: very large graphs may need a bigger batch size parameter for WebGraph
 internals (you can specify a value when running the compression script using:
 ``--batch-size 1000000000``).
 
 
 Node identifier mappings
 ~~~~~~~~~~~~~~~~~~~~~~~~
 
 To dump the mapping files (i.e., various node id <-> other info mapping files,
 in either ``.csv.gz`` or ad-hoc ``.map`` format):
 
 .. code:: bash
 
     $ java -cp app/swh-graph.jar \
-        org.softwareheritage.graph.backend.Setup data/compressed/g
+        org.softwareheritage.graph.backend.Setup \
+        data/g.nodes.csv.gz data/compressed/g
 
 
 Graph server
 ~~~~~~~~~~~~
 
 To start the swh-graph server:
 
 .. code:: bash
 
     $ java -cp app/swh-graph.jar \
         org.softwareheritage.graph.App data/compressed/g
 
 To specify the port on which the server will run, use the `--port` or `-p` flag
 (default is 5009).