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-rw-r--r--docs/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/docs/Makefile b/docs/Makefile
index 10d4d4b..427a980 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -10,7 +10,7 @@ BUILDDIR = _build
# Internal variables.
PAPEROPT_a4 = -D latex_paper_size=a4
PAPEROPT_letter = -D latex_paper_size=letter
-ALLSPHINXOPTS = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
+ALLSPHINXOPTS = -E -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
# the i18n builder cannot share the environment and doctrees with the others
I18NSPHINXOPTS = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .