Google Linux Software Repositories

apt-get update時にエラーになる。

Failed to fetch Unable to find expected entry non-free/binary-amd64/Packages in Meta-index file (malformed Release file?)
Reading package lists... Done
W: Couldn't stat source package list stable/non-free Packages (/var/lib/apt/lists/ - stat (2 No such file or directory)
W: You may want to run apt-get update to correct these problems
E: Some index files failed to download, they have been ignored, or old ones used instead.