...
ok Installed github:jspm/nodelibs-http@^1.7.0 (1.7.1)
Downloading npm:https-browserify@0.0.0
(node:16028) DeprecationWarning: Calling an asynchronous function without callback is deprecated.
ok Installed npm:os-browserify@^0.1.2 (0.1.2)
(node:16028) DeprecationWarning: Calling an asynchronous function without callback is deprecated.
ok Installed npm:https-browserify@0.0.0 (0.0.0)
(node:16028) DeprecationWarning: Calling an asynchronous function without callback is deprecated.
ok Installed npm:Base64@~0.2.0 (0.2.1)
ok Installed clean-css as npm:clean-css@^3.4.8 (3.4.25)
(node:16028) DeprecationWarning: Calling an asynchronous function without callback is deprecated.
(node:16028) DeprecationWarning: Calling an asynchronous function without callback is deprecated.
(node:16028) DeprecationWarning: Calling an asynchronous function without callback is deprecated.
ok Installed babel-runtime as npm:babel-runtime@^5.8.24 (5.8.38)
(node:16028) DeprecationWarning: Calling an asynchronous function without callback is deprecated.
(node:16028) DeprecationWarning: Calling an asynchronous function without callback is deprecated.
(node:16028) DeprecationWarning: Calling an asynchronous function without callback is deprecated.
(node:16028) DeprecationWarning: Calling an asynchronous function without callback is deprecated.
(node:16028) DeprecationWarning: Calling an asynchronous function without callback is deprecated.
(node:16028) DeprecationWarning: Calling an asynchronous function without callback is deprecated.
(node:16028) DeprecationWarning: Calling an asynchronous function without callback is deprecated.
...
This is a typical set of warnings: