This release primarily includes a fix for an issue involving two programs racing to MkdirAll the same directory, which caused a regression with BuildKit.

• MkdirAll will now no longer return an EEXIST error if two racing processes are creating the same directory. We will still verify that the path is a directory, but this will avoid spurious errors when multiple threads or programs are trying to MkdirAll the same path. opencontainers/runc#4543

Signed-off-by: Aleksa Sarai cyphar@cyphar.com