diff --git a/Dockerfile b/Dockerfile
index 86703430a..66d50380e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,14 +6,7 @@ FROM xmppxsf/xeps-base:latest as build
 ARG NCORES=1
 ARG TARGETS="html inbox-html inbox-xml pdf xeplist refs xml"
 
-COPY *.xml xep.* *.css *.xsl *.js *.xsl Makefile /src/
-COPY resources/*.pdf /src/resources/
-COPY tools/*.py /src/tools/
-COPY inbox/*.xml inbox/*.ent inbox/*.dtd /src/inbox/
-COPY texml-xsl/*.xsl /src/texml-xsl/
-
-WORKDIR /src
-RUN OUTDIR=/var/www/html/extensions/ make -j$NCORES $TARGETS
+RUN --mount=target=/xeps make -C /xeps -j$NCORES $TARGETS OUTDIR=/var/www/html/extensions
 RUN bash -c 'rm -f /var/www/html/extensions/*.{log,aux,toc,tex,tex.xml,out}'
 
 FROM nginx:1-alpine
diff --git a/Makefile b/Makefile
index 26efb1ba7..34a74a8e4 100644
--- a/Makefile
+++ b/Makefile
@@ -76,8 +76,11 @@ inbox-xml: $(OUTDIR)/inbox $(proto_xep_xmls)
 .PHONY: pdf
 pdf: $(xep_pdfs)
 
+$(REFSDIR)/LICENSE: refs-LICENSE
+	cp $< $@
+
 .PHONY: refs
-refs: $(xep_refs)
+refs: $(xep_refs) $(REFSDIR)/LICENSE
 
 .PHONY: examples
 examples: $(xep_examples)
diff --git a/refs-LICENSE b/refs-LICENSE
new file mode 100644
index 000000000..64791b8c3
--- /dev/null
+++ b/refs-LICENSE
@@ -0,0 +1,9 @@
+To the extent possible under law, the XMPP Standards Foundation (XSF)
+has waived all copyright and related or neighboring rights to XSF's
+bibliographic data.
+
+That is, the bibliographic data, which is also accessible via
+https://xmpp.org/extensions/refs/, is put in the public domain via
+CC0 1.0 [1].
+
+1: https://creativecommons.org/publicdomain/zero/1.0/