I am trying to install updates for a Dell XPS running Ubuntu 12.04 LTS. It fails with the following error:
Failed to download package files
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Details
Failed to fetch http://ca.archive.ubuntu.com/ubuntu/pool/main/m/mesa-lts-quantal/libgl1-mesa-dri-lts-quantal_9.0.2-0ubuntu0.1~precise1_amd64.deb 404 Not Found [IP: 91.189.92.200 80] Failed to fetch http://ca.archive.ubuntu.com/ubuntu/pool/main/m/mesa-lts-quantal/libgl1-mesa-glx-lts-quantal_9.0.2-0ubuntu0.1~precise1_amd64.deb 404 Not Found [IP: 91.189.92.200 80] Failed to fetch http://ca.archive.ubuntu.com/ubuntu/pool/main/m/mesa-lts-quantal/libglapi-mesa-lts-quantal_9.0.2-0ubuntu0.1~precise1_amd64.deb 404 Not Found [IP: 91.189.92.200 80] Failed to fetch http://ca.archive.ubuntu.com/ubuntu/pool/main/m/mesa-lts-quantal/libxatracker1-lts-quantal_9.0.2-0ubuntu0.1~precise1_amd64.deb 404 Not Found [IP: 91.189.92.200 80] Failed to fetch http://ca.archive.ubuntu.com/ubuntu/pool/main/n/nautilus/libnautilus-extension1a_3.4.2-0ubuntu7_amd64.deb 404 Not Found [IP: 91.189.92.200 80]
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At the time of this posting, these files are not on the server. How do I fix this problem?