This package is a leaf that exports no libraries, so propagating its
inputs should have no effect.
The fixDarwinDylibNames hook only applies to *.dylib files, which this
package does not contain.
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.