! exec cue cmd notool
! stdout .
cmp stderr cmd_baddisplay.out

-- cmd_baddisplay.out --
could not find command "notool"
Ensure custom commands are defined in a "_tool.cue" file.
Run 'cue help cmd' to list available custom commands.
-- task.cue --
package home
message: "Hello world!"

command: notool: {
	task: display: {
		kind: "print"
		text: 42
	}
}
