| 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/docker/docker/pkg/parsers/kernel | Package kernel provides helper function to get, parse and compare kernel versions for different platforms. |
| github.com/docker/docker/pkg/useragent | Package useragent provides helper functions to pack version information into a single User-Agent header. |
| runtime | Package runtime contains operations that interact with Go's runtime system, such as functions to control goroutines. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |