Emulator import fails (imagebuilder seems to lack rights)

Originally reported in eaasi-installer GitLab project:

Error message reported when importing emulators into a blank/new installation:

2020-07-14 07:08:37,443 INFO [MediumBuilderHDD] (EE-ManagedExecutorService-io-Thread-4) (build-8967403453321770883) Waiting for subprocess 614 to finish…
2020-07-14 07:08:37,484 INFO [MediumBuilderHDD] (EE-ManagedExecutorService-io-Thread-4) (build-8967403453321770883) Subprocess 614 terminated with code 0
2020-07-14 07:08:37,485 INFO [MediumBuilderHDD] (EE-ManagedExecutorService-io-Thread-4) (build-8967403453321770883) Emulator’s version: git+eaas-07102019
2020-07-14 07:08:37,486 INFO [MediumBuilderHDD] (EE-ManagedExecutorService-io-Thread-4) (build-8967403453321770883) Starting subprocess: oci-image-tool unpack --ref name= /tmp/eaas/imagebuilder/build-8967403453321770883/image /tmp/eaas/imagebuilder/build-8967403453321770883/rootfs
2020-07-14 07:08:37,505 INFO [MediumBuilderHDD] (EE-ManagedExecutorService-io-Thread-4) (build-8967403453321770883) Waiting for subprocess 625 to finish…
2020-07-14 07:08:43,970 INFO [MediumBuilderHDD] (EE-ManagedExecutorService-io-Thread-4) (build-8967403453321770883) Subprocess 625 terminated with code 1
2020-07-14 07:08:43,970 INFO [MediumBuilderHDD] (EE-ManagedExecutorService-io-Thread-4) (build-8967403453321770883) Subprocess 625 STDERR:
lstat /tmp/eaas/imagebuilder/build-8967403453321770883/rootfs/usr/lib/python3/dist-packages/pycache/.wh…opq: operation not permitted
unable to delete whiteout path
github.com/opencontainers/image-tools/image.unpackLayerEntry
/root/work/src/github.com/opencontainers/image-tools/image/manifest.go:263
github.com/opencontainers/image-tools/image.unpackLayer
/root/work/src/github.com/opencontainers/image-tools/image/manifest.go:205
github.com/opencontainers/image-tools/image.unpackManifest.func2
/root/work/src/github.com/opencontainers/image-tools/image/manifest.go:109
github.com/opencontainers/image-tools/image.(*pathWalker).find
/root/work/src/github.com/opencontainers/image-tools/image/walker.go:242
github.com/opencontainers/image-tools/image.unpackManifest
/root/work/src/github.com/opencontainers/image-tools/image/manifest.go:108
github.com/opencontainers/image-tools/image.unpack
/root/work/src/github.com/opencontainers/image-tools/image/image.go:205
github.com/opencontainers/image-tools/image.UnpackLayout
/root/work/src/github.com/opencontainers/image-tools/image/image.go:151
main.unpackAction
/root/work/src/github.com/opencontainers/image-tools/cmd/oci-image-tool/unpack.go:72
github.com/opencontainers/image-tools/vendor/github.com/urfave/cli.HandleAction
/root/work/src/github.com/opencontainers/image-tools/vendor/github.com/urfave/cli/app.go:485
github.com/opencontainers/image-tools/vendor/github.com/urfave/cli.Command.Run
/root/work/src/github.com/opencontainers/image-tools/vendor/github.com/urfave/cli/command.go:193
github.com/opencontainers/image-tools/vendor/github.com/urfave/cli.(*App).Run
/root/work/src/github.com/opencontainers/image-tools/vendor/github.com/urfave/cli/app.go:250
main.main
/root/work/src/github.com/opencontainers/image-tools/cmd/oci-image-tool/main.go:63
runtime.main
/usr/lib/go-1.10/src/runtime/proc.go:198
runtime.goexit
/usr/lib/go-1.10/src/runtime/asm_amd64.s:2361
unpack: error extracting layer
github.com/opencontainers/image-tools/image.unpackManifest.func2
/root/work/src/github.com/opencontainers/image-tools/image/manifest.go:110
github.com/opencontainers/image-tools/image.(*pathWalker).find
/root/work/src/github.com/opencontainers/image-tools/image/walker.go:242
github.com/opencontainers/image-tools/image.unpackManifest
/root/work/src/github.com/opencontainers/image-tools/image/manifest.go:108
github.com/opencontainers/image-tools/image.unpack
/root/work/src/github.com/opencontainers/image-tools/image/image.go:205
github.com/opencontainers/image-tools/image.UnpackLayout
/root/work/src/github.com/opencontainers/image-tools/image/image.go:151
main.unpackAction
/root/work/src/github.com/opencontainers/image-tools/cmd/oci-image-tool/unpack.go:72
github.com/opencontainers/image-tools/vendor/github.com/urfave/cli.HandleAction
/root/work/src/github.com/opencontainers/image-tools/vendor/github.com/urfave/cli/app.go:485
github.com/opencontainers/image-tools/vendor/github.com/urfave/cli.Command.Run
/root/work/src/github.com/opencontainers/image-tools/vendor/github.com/urfave/cli/command.go:193
github.com/opencontainers/image-tools/vendor/github.com/urfave/cli.(*App).Run
/root/work/src/github.com/opencontainers/image-tools/vendor/github.com/urfave/cli/app.go:250
main.main
/root/work/src/github.com/opencontainers/image-tools/cmd/oci-image-tool/main.go:63
runtime.main
/usr/lib/go-1.10/src/runtime/proc.go:198
runtime.goexit
/usr/lib/go-1.10/src/runtime/asm_amd64.s:2361