Nix: Adjust test case.

Author: mboes

src/test/Stack/NixSpec.hs

@@ -63,5 +63,5 @@ spec = beforeAll setup $ afterAll teardown $ do
     it "sees that the only package asked for is glpk and adds GHC from nixpkgs mirror of LTS resolver" $ \T{..} -> inTempDir $ do
       writeFile (toFilePath stackDotYaml) sampleConfig
       lc <- loadConfig' manager
-      (nixPackages $ configNix $ lcConfig lc) `shouldBe` ["glpk", "haskell.packages.lts-2_10.ghc"]
-
+      (nixPackages $ configNix $ lcConfig lc) `shouldBe` ["glpk"]
+      (nixCompiler $ configNix $ lcConfig lc) Nothing Nothing `shouldBe` "haskell.packages.lts-2_10.ghc"