{
  "name": "Pension Guidance",
  "description": "Pension guidance from Pension Wise.",
  "website": "https://www.pensionwise.gov.uk",
  "repository": "https://github.com/guidance-guarantee-programme/pension_guidance",
  "env": {
    "LOCATIONS_TTL": "3600",
    "LOCATIONS_URL": "https://locator.pensionwise.gov.uk/locations.json",
    "NEW_RELIC_LOG": "STDOUT",
    "SECRET_KEY_BASE": {
      "description": "Cryptographically secure secret key (typically used to generate a secret for cookie sessions)",
      "generator": "secret"
    },
    "GITHUB_AUTH_TOKEN": ""
  },
  "addons": [
    "heroku-postgresql",
    "heroku-redis",
    "logentries"
  ],
  "buildpacks": [
    {
      "url": "heroku/nodejs"
    },
    {
      "url": "heroku/ruby"
    },
    {
      "url": "https://github.com/lm-tools/heroku-buildpack-princexml.git"
    }
  ]
}

{
  "name": "Pension Guidance",
  "description": "Pension guidance from Pension Wise.",
  "website": "https://www.pensionwise.gov.uk",
  "repository": "https://github.com/guidance-guarantee-programme/pension_guidance",
  "env": {
    "LOCATIONS_TTL": "3600",
    "LOCATIONS_URL": "https://locator.pensionwise.gov.uk/locations.json",
    "NEW_RELIC_LOG": "STDOUT",
    "SECRET_KEY_BASE": {
      "description": "Cryptographically secure secret key (typically used to generate a secret for cookie sessions)",
      "generator": "secret"
    },
    "GITHUB_AUTH_TOKEN": ""
  },
  "addons": [
    "heroku-postgresql",
    "heroku-redis",
    "logentries"
  ],
  "buildpacks": [
    {
      "url": "heroku/nodejs"
    },
    {
      "url": "heroku/ruby"
    },
    {
      "url": "https://github.com/guidance-guarantee-programme/heroku-buildpack-princexml.git#version-bump"
    }
  ]
}

Use forked version of princexml buildpack
Use forked version of princexml buildpack
