avoid re-resolving dependencies in Dockerfile
dependencies are resolved during `pip wheel` in the build stage
avoids errors about removing the apk-installed python-packaging
@@ -22,7 +22,7 @@ RUN pip3 install hg-evolve --user --no-cache-dir
# install repo2docker
COPY --from=0 /tmp/wheelhouse /tmp/wheelhouse
-RUN pip3 install --no-cache-dir /tmp/wheelhouse/*.whl \
+RUN pip3 install --no-cache-dir --ignore-installed --no-deps /tmp/wheelhouse/*.whl \
&& pip3 list
# add git-credential helper
