Updated the cabal file for guide with index-project library

REPL/stack.yaml

@@ -63,4 +63,4 @@ extra-package-dbs: []
 # extra-lib-dirs: [/path/to/dir]
 #
 # Allow a newer minor version of GHC than the snapshot specifies
-# compiler-check: newer-minor
+# compiler-check: newer-minor

guide.cabal

@@ -111,6 +111,7 @@ library
                      , http-types
                      , hvect
                      , ilist
+                     , index-project
                      , iproute == 1.7.*
                      , lucid >= 2.9.5 && < 3
                      , megaparsec == 5.*
@@ -145,6 +146,7 @@ library
                      , wai-middleware-static
                      , xml
                      , xss-sanitize
+
   ghc-options:         -Wall -fno-warn-unused-do-bind
   hs-source-dirs:      src
   default-language:    Haskell2010

stack.yaml

@@ -6,6 +6,7 @@ packages:
     git: https://github.com/aelve/stache-plus
     commit: 789aeabbf8069dec80647160f127d047e8f5a330
   extra-dep: true
+- location: 'REPL'
 
 extra-deps:
 - cmark-sections-0.1.0.3