Merge pull request #1572 from nomeata/patch-4

All my packages should work now with GHC 8 now

build-constraints.yaml

@@ -548,12 +548,12 @@ packages:
     "Joachim Breitner <mail@joachim-breitner.de>":
         - circle-packing
         - arbtt
-        # GHC 8 - ghc-heap-view
+        - ghc-heap-view
         - tttool
-        # GHC 8 - gipeda
+        - gipeda
         - list-fusion-probe
         - haskell-spacegoo
-        # GHC 8 - tasty-expected-failure
+        - tasty-expected-failure
 
     "Aditya Bhargava <adit@adit.io":
         - HandsomeSoup
@@ -2339,6 +2339,10 @@ package-flags:
     jsaddle:
         gtk3: true
 
+    ghc-heap-view:
+        ghc_7_7: false
+        ghc_8_0: true
+
 # end of package-flags
 
 # Special configure options for individual packages