diff --git a/docs/images/Makefile b/docs/images/Makefile
--- a/docs/images/Makefile
+++ b/docs/images/Makefile
@@ -5,8 +5,17 @@
 DEP_GRAPHS += $(patsubst %,%.pdf,$(DEP_GRAPHS_base))
 DEP_GRAPHS += $(patsubst %,%.svg,$(DEP_GRAPHS_base))
 PY_DEPGRAPH = ../bin/py-depgraph
+REPO_IMAGES_DIRS = $(filter-out ../../../swh-docs/docs/images/,$(wildcard ../../../*/docs/images/))
 
-all: $(DEP_GRAPHS)
+all: $(DEP_GRAPHS) import-ext
+
+import-ext:
+	for dir in $(REPO_IMAGES_DIRS); do \
+		$(MAKE) -C $$dir; \
+		if [ -n "$(wildcard $$dir/*.svg)" ]; then \
+			cp $(wildcard $$dir/*.svg) $(CURDIR)/ ; \
+		fi; \
+	done
 
 py-deps-all.dot: $(PY_DEPGRAPH) $(PY_REQUIREMENTS)
 	cd ../../.. ; $(CURDIR)/$(PY_DEPGRAPH) > $(CURDIR)/$@