HERMIT does not build with HEAD

[andygill]

https://travis-ci.org/ku-fpg/hermit/ fails with

trying: hermit-1.0.0.1:*test
trying: tasty-golden-2.3.1 (dependency of hermit-1.0.0.1:*test)
next goal: async (dependency of tasty-golden-2.3.1)
rejecting: async-2.0.2 (conflict: base==4.9.0.0/installed-4.9..., async =>
base>=4.3 && <4.9)
rejecting: async-2.0.1.6, async-2.0.1.5 (conflict:
base==4.9.0.0/installed-4.9..., async => base>=4.3 && <4.8)
rejecting: async-2.0.1.4, async-2.0.1.3 (conflict:
base==4.9.0.0/installed-4.9..., async => base>=4.3 && <4.7)
rejecting: async-2.0.1.2, async-2.0.1.1, async-2.0.1.0, async-2.0.0.0
(conflict: base==4.9.0.0/installed-4.9..., async => base>=4.3 && <4.6)
trying: async-1.4
trying: optparse-applicative-0.12.0.0 (dependency of tasty-golden-2.3.1)
next goal: tasty (dependency of hermit-1.0.0.1:*test)
rejecting: tasty-0.11.0.2, tasty-0.11.0.1, tasty-0.11, tasty-0.10.1.2,
tasty-0.10.1.1, tasty-0.10.1, tasty-0.10.0.4, tasty-0.10.0.3, tasty-0.10.0.2,
tasty-0.10.0.1 (conflict: async==1.4, tasty => async>=2.0)
rejecting: tasty-0.10, tasty-0.9.0.1 (conflict:
optparse-applicative==0.12.0.0, tasty => optparse-applicative>=0.10 && <0.11)
rejecting: tasty-0.8.1.3, tasty-0.8.1.2, tasty-0.8.1.1, tasty-0.8.0.4,
tasty-0.8.0.2, tasty-0.8 (conflict: optparse-applicative==0.12.0.0, tasty =>
optparse-applicative>=0.6 && <0.10)
rejecting: tasty-0.7, tasty-0.6, tasty-0.5.2.1, tasty-0.5.2, tasty-0.5.1,
tasty-0.5, tasty-0.4.2, tasty-0.4.1.1, tasty-0.4.0.1, tasty-0.4, tasty-0.3.1,
tasty-0.3, tasty-0.2, tasty-0.1.1, tasty-0.1 (conflict: hermit-1.0.0.1:test =>
tasty>=0.8)

[xich]

A new version of async which supports base-4.9 was uploaded today. Perhaps try again?

In general the HEAD build is going to fail like this for a while after a new release while the packages we depend on bump their bounds. It's only useful once someone sits down and gets it working the first time, which might require sending patches to bump bounds on other projects.