concatonating values from chance generator

[jnicho02]

I wanted a full name consisting of chance.first() and chance.last() but

name: `${factory.chance('first')} ${factory.chance('last')}`

gives me

name: 'function () {\n      return generator.generate.apply(generator, args);\n    } function () {\n      return generator.generate.apply(generator, args);\n    }'

If I use the Chance lib directly then I get the same values repeated during a buildMany.

I tried lots of combinations but no joy. Any ideas?