Shake.hs, stack-ghc8.2.yaml: missing extra-dep for pandoc

Shake.hs

@@ -300,7 +300,7 @@ main = do
     pandocSiteFilter %> \out -> do
         let source = out <.> "hs"
         need [source]
-        cmd "stack --stack-yaml=stack-ghc8.2.yaml ghc --package pandoc -- -o" out source
+        cmd "stack --stack-yaml=stack-ghc8.2.yaml ghc -- -o" out source
 
     "site/_site/files/README" : [ "site/_site//*" <.> ext | ext <- webcopyfileexts ] |%> \out -> do
         let input = "site" </> dropDirectory2 out

stack-ghc8.2.yaml

@@ -13,9 +13,10 @@ extra-deps:
 - easytest-0.2
 # XXX may need to enable these when building Shake.hs.
 # They probably shouldn't be here, and are causing headaches, so commented for now.
-# - pandoc-2.2.1
-# - http-types-0.11
-# - skylighting-0.5.1
+- pandoc-2.1.1
+- http-types-0.11
+- skylighting-0.5.1
+- haddock-library-1.4.5
 
 nix:
   pure: false