/usr/share/gocode/ is in golang-github-opencontainers-image-spec-dev 1.0.0~rc2+dfsg-1.
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/usr/share/gocode/src/
/usr/share/gocode/src/github.com/
/usr/share/gocode/src/github.com/opencontainers/
/usr/share/gocode/src/github.com/opencontainers/image-spec/
/usr/share/gocode/src/github.com/opencontainers/image-spec/specs-go/
/usr/share/gocode/src/github.com/opencontainers/image-spec/specs-go/v1/
/usr/share/gocode/src/github.com/opencontainers/image-spec/specs-go/v1/config.go
/usr/share/gocode/src/github.com/opencontainers/image-spec/specs-go/v1/descriptor.go
/usr/share/gocode/src/github.com/opencontainers/image-spec/specs-go/v1/manifest.go
/usr/share/gocode/src/github.com/opencontainers/image-spec/specs-go/v1/manifest_list.go
/usr/share/gocode/src/github.com/opencontainers/image-spec/specs-go/v1/mediatype.go
/usr/share/gocode/src/github.com/opencontainers/image-spec/specs-go/version.go
/usr/share/gocode/src/github.com/opencontainers/image-spec/specs-go/versioned.go