Brendan Tildesley <brendan.tildesley@openmailbox.org> writes:

> gnu/packages/python.scm (python-dukpy, python2-dukpy): New variables.

[...]

> +    (description
> +     "dukpy is a JavaScript runtime environment for Python using the duktape
> +embeddable JavaScript engine.")
> +    (license license:expat)))

'errors.c' is actually GPL3.  I added it.