Resolving dependencies...
Starting     tagged-0.8.8
Starting     os-string-2.0.2.1
Building     tagged-0.8.8
Building     os-string-2.0.2.1
Completed    tagged-0.8.8
Starting     boring-0.2.1
Building     boring-0.2.1
Completed    os-string-2.0.2.1
Starting     filepath-1.5.2.0
Completed    boring-0.2.1
Building     filepath-1.5.2.0
Completed    filepath-1.5.2.0
Starting     hashable-1.4.4.0
Building     hashable-1.4.4.0
Completed    hashable-1.4.4.0
Downloading  constraints-0.14.1
Downloaded   constraints-0.14.1
Starting     constraints-0.14.1
Building     constraints-0.14.1
Completed    constraints-0.14.1