This requires some small changes in the stdenv, then working around the
weird choice LLVM made to hardcode @rpath in its install name, and then
lets us remove a ton of annoying workaround hacks in many of our Go
packages. With any luck this will mean less hackery going forward.
* First attempt at making elvish compile on darwin
* Fixed cyclic dependency on darwin
This fixes the "cycle detected in the references of" error when building
on darwin. The fix is based on the solution in issue #18131.
* Use version 0.10 and not 0.10.1, which is not officially released yet
