+FROM ubuntu:20.04
+RUN apt-get update && \
+ apt-get install -y --no-install-recommends \
+ curl \
+ ca-certificates
+WORKDIR /tmp
+RUN curl -f https://curl.se/ca/cacert.pem -o cacert.pem
+
FROM ubuntu:16.04
+# The ca-certificates in ubuntu-16 is too old, so update the certificates
+# with something more recent.
+COPY --from=0 /tmp/cacert.pem /tmp/cacert.pem
+ENV CURL_CA_BUNDLE /tmp/cacert.pem
+
COPY scripts/cross-apt-packages.sh /scripts/
RUN sh /scripts/cross-apt-packages.sh