{
	"libraries": {
		"boost": {
			"repository": "git@github.com:boostorg/boost.git",
			"commit": "9ccd3390c8e9ef05f4cb681d15b2e14eac48886e",
			"project": {
				"post-clean": "./bootstrap.sh",
				"b2-args": "--with-filesystem",
				"conditionals": {
					"platform": {
						"!host": { "build": false }
					}
				}
			}
		}
	}
}
{
	"libraries": {
		"boost": {
			"repository": "git@github.com:boostorg/boost.git",
			"commit": "boost-1.59.0",
			"project": {
				"post-clean": "./bootstrap.sh",
				"pre-build": "b2 headers",
				"b2-args": [
					"--with-filesystem",
					"--with-thread"
				],
				"conditionals": {
					"platform": {
						"!host": { "build": false }
					}
				}
			}
		}
	}
}
Update Boost example with required pre-build step
Update Boost example with required pre-build step
