fix dependency issue
fix dependency issue

elggem/external-tools,opencog/external-tools,elggem/external-tools,elggem/external-tools,opencog/external-tools,opencog/external-tools,ngeiswei/external-tools,opencog/external-tools,tanksha/external-tools,ngeiswei/external-tools,opencog/external-tools,elggem/external-tools,ngeiswei/external-tools,tanksha/external-tools,elggem/external-tools,opencog/external-tools,ngeiswei/external-tools,ngeiswei/external-tools,tanksha/external-tools,opencog/external-tools,tanksha/external-tools,tanksha/external-tools,elggem/external-tools,ngeiswei/external-tools,tanksha/external-tools,tanksha/external-tools