internal/pkg: do not connect stdin

This introduces external state when verbose.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/pkg/exec.go

@@ -281,7 +281,7 @@ func (a *execArtifact) cure(c *CureContext, hostNet bool) (err error) {
 	}
 	z.Uid, z.Gid = (1<<10)-1, (1<<10)-1
 	if a.msg.IsVerbose() {
-		z.Stdin, z.Stdout, z.Stderr = os.Stdin, os.Stdout, os.Stderr
+		z.Stdout, z.Stderr = os.Stdout, os.Stderr
 	}
 
 	z.Dir, z.Env, z.Path, z.Args = a.dir, a.env, a.path, a.args