diff --git a/odoo/odoo/Dockerfile.py3o.10 b/odoo/odoo/Dockerfile.py3o.10
index e2fba51..cf326bb 100644
--- a/odoo/odoo/Dockerfile.py3o.10
+++ b/odoo/odoo/Dockerfile.py3o.10
@@ -13,6 +13,9 @@ RUN git clone --depth 1 -b 10.0 https://github.com/OCA/reporting-engine && \
     cd reporting-engine && \
     git fetch origin pull/180/head:10.0-bypass-fusion && git checkout 10.0-bypass-fusion
 # Addons dependencies
-RUN pip install --user py3o.template && pip install --user py3o.formats
+# TMP : use latest master for better error reporting
+RUN pip install --user hg+https://bitbucket.org/faide/py3o.template
+# RUN pip install --user py3o.template && pip install --user py3o.formats
+RUN pip install --user py3o.formats
 
 WORKDIR /opt/odoo