| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/containerd/containerd | |
| github.com/containerd/containerd/cio | |
| github.com/containerd/log | Package log provides types and functions related to logging, passing loggers through a context, and attaching context to the logger. |
| github.com/docker/docker/errdefs | Package errdefs defines a set of error interfaces that packages should use for communicating classes of errors. |
| github.com/docker/docker/libcontainerd | |
| github.com/docker/docker/libcontainerd/types | |
| github.com/opencontainers/runtime-spec/specs-go | |
| github.com/pkg/errors | Package errors provides simple error handling primitives. |
| io | Package io provides basic interfaces to I/O primitives. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |
| syscall | Package syscall contains an interface to the low-level operating system primitives. |