| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| encoding/base64 | Package base64 implements base64 encoding as specified by RFC 4648. |
| encoding/json | Package json implements encoding and decoding of JSON as defined in RFC 7159. |
| github.com/containerd/containerd/reference | |
| github.com/docker/distribution/reference | Package reference is deprecated, and has moved to github.com/distribution/reference. |
| github.com/moby/buildkit/exporter/containerimage/exptypes | |
| github.com/moby/buildkit/source | |
| github.com/moby/buildkit/util/buildinfo/types | |
| github.com/moby/buildkit/util/urlutil | |
| github.com/pkg/errors | Package errors provides simple error handling primitives. |
| sort | Package sort provides primitives for sorting slices and user-defined collections. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |