buildx failed with: ERROR: failed to solve: process "/bin/sh -c echo \"deb [arch=amd64] https://apt-mo.trafficmanager.net/repos/dotnet-release/ xenial main\" > /etc/apt/sources.list.d/dotnetdev.list && apt-key adv --keyserver apt-mo.trafficmanager.net --recv-keys 417A0893 && apt-get update && apt-get install -y -q --no-install-recommends sudo gcc make curl pypy dotnet-dev-1.0.0 linux-headers-generic libssl-dev python2-dev python3-dev pypy-dev && apt-get clean && rm -rf /var/lib/apt/lists/* && wget https://raw.githubusercontent.com/dotnet/core/master/release-notes/1.0/install-1.0.1.sh && chmod +x install-1.0.1.sh && (echo \"y\" | bash install-1.0.1.sh) && rm install-1.0.1.sh" did not complete successfully: exit code: 2