Fixed dependency problem for GHC-7.8

stack-7.8.yaml

@@ -6,6 +6,13 @@ resolver: lts-2.22
 # Local packages, usually specified by relative directory name
 packages:
 - '.'
+- location:
+    git: https://github.com/fpco/ide-backend.git
+    commit: 4b57b77d59d3261c8eef5fa40159ab9d78a6d197
+  subdirs:
+  - ide-backend
+  - ide-backend-common
+  - ide-backend-server
   
 # Packages to be pulled from upstream that are not in the resolver (e.g., acme-missiles-0.3)
 extra-deps: []

wai-devel.cabal

@@ -29,7 +29,7 @@ library
                      , Devel.Modules
 
   -- other-extensions:
-  build-depends:       base >= 4.8 && <5.0
+  build-depends:       base >= 4.7 && <5.0
                      , Cabal-ide-backend >= 1.23 && < 1.24
                      , Glob >= 0.7 && < 0.8
                      , MissingH >= 1.3 && < 1.4