[Nix-dev] Overriding Haskell dependencies

[Peter Simons]

Hi Michael,

 > While haskellEnv works fine, stackageEnv results in infinite
 > recursion: [...].

the test suite "text" depends on packages that depend on "text. The
easiest way to remedy this issue is to set "doCheck = true;" I suppose.

An alternative (harder) solution would be to instantiate those
dependencies of text with a version of text that has the test suite
disabled to break the bootstrapping cycle.

I hope this helps,
Peter