melange completion panics

[scop]

$ melange completion 
panic: runtime error: index out of range [0] with length 0

goroutine 1 [running]:
chainguard.dev/melange/pkg/cli.New.completion.func2(0xc0001c3d00?, {0x31b9e80?, 0x4?, 0x1d9a73e?})
	chainguard.dev/melange/pkg/cli/completion.go:61 +0x133
github.com/spf13/cobra.(*Command).execute(0xc000588c08, {0x31b9e80, 0x0, 0x0})
	github.com/spf13/[email protected]/command.go:989 +0xa91
github.com/spf13/cobra.(*Command).ExecuteC(0xc000588308)
	github.com/spf13/[email protected]/command.go:1117 +0x3ff
github.com/spf13/cobra.(*Command).Execute(...)
	github.com/spf13/[email protected]/command.go:1041
github.com/spf13/cobra.(*Command).ExecuteContext(0x20728c0?, {0x2072a80?, 0xc000414180?})
	github.com/spf13/[email protected]/command.go:1034 +0x47
main.main()
	chainguard.dev/melange/main.go:30 +0x96

E.g. melange completion bash works though.