gistfile1.txt

{
    "packages": {
        "iron-router": {
            "git": "https://github.com/EventedMind/iron-router.git",
            "branch": "blaze-integration"
        },
        "iron-router-progress": {},
        "q": {},
        "npm": {},
        "spin": {},
        "fast-render": {},
        "blaze-layout": {
            "git": "https://github.com/EventedMind/blaze-layout.git",
            "branch": "devel"
        },
        "font-awesome-4-less": {},
        "bootstrap-3": {},
        "lodash": {}
    }
}


$ mrt update
✓ iron-router
    branch: https://github.com/EventedMind/iron-router.git#blaze-integration
✓ blaze-layout
    branch: https://github.com/EventedMind/blaze-layout.git#devel
Problem installing iron-router
  ✘ [latest] conflicts with [branch: https://github.com/EventedMind/iron-router.git#blaze-integration]
Can't resolve dependencies! Use --force if you don't mind mrt taking a wild guess and running your app anyway.