What causes "failed to mkdir to copy content to container: %w" in nektos/act?

Check the wrapped Docker error; the container may have stopped or the path may be invalid.

failed to mkdir to copy content to container: %w

Error message

failed to mkdir to copy content to container: %w

What it means

Error "failed to mkdir to copy content to container: %w" thrown in nektos/act.

Source

Thrown at pkg/container/docker_run.go:724

tw := tar.NewWriter(buf)
_ = tw.WriteHeader(&tar.Header{
	Name:     destPath,
	Mode:     0o777,
	Typeflag: tar.TypeDir,
})
tw.Close()
_, err := cr.cli.CopyToContainer(ctx, cr.id, client.CopyToContainerOptions{DestinationPath: "/", Content: buf})
if err != nil {
	return fmt.Errorf("failed to mkdir to copy content to container: %w", err)
}

View on GitHub (pinned to 4f41128141)

Solutions

Check the wrapped Docker error; the container may have stopped or the path may be invalid.
Ensure the target directory path inside the container is valid and writable.

When it happens

Trigger: Thrown at pkg/container/docker_run.go:724 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of nektos/act@4f41128141 (2026-08-15). Data as JSON: /api/errors/52e8a501142e7f27. Report an issue: GitHub.