Improve missing dependency message, to cover build-tools

Author: mpilgrem

src/Stack/Types/Build/Exception.hs

@@ -699,8 +699,13 @@ pprintExceptions exceptions stackYaml stackRoot isImplicitGlobal parentMap wante
               [ flow "(no matching package and version found. Perhaps there is \
                      \an error in the specification of a package's"
               , style Shell "dependencies"
+              , "or"
+              , style Shell "build-tools"
               , flow "(Hpack) or"
-              , style Shell "build-depends"
+              , style Shell "build-depends" <> ","
+              , style Shell "build-tools"
+              , "or"
+              , style Shell "build-tool-depends"
               , flow "(Cabal file)"
               , flow "or an omission from the"
               , style Shell "packages"