Unrecognized font family 'Ionicons'

[charlieroth]

Here I have a simple component:

import React, { Component } from 'react';
import {
  Container,
  Header,
  Title,
  Content,
  Button,
  Icon,
} from 'native-base';

export default class App extends Component {
  render() {
    return(
      <Container>
        <Header>
          <Button transparent>
              <Icon name="ios-arrow-back" />
          </Button>

          <Title>Header</Title>

          <Button transparent>
              <Icon name="ios-menu" />
          </Button>
        </Header>

        <Content>

        </Content>
      </Container>
    );
  }
}

I ran rnpm link like I was told to do in the Getting Started section of the docs. I am getting this error:

Any suggestions? Should I try to link native-base manually following the instructions in the docs?