--- ghc-7.6.3/utils/ghc-cabal/Main.hs~	2013-04-19 06:22:47.000000000 +0900
+++ ghc-7.6.3/utils/ghc-cabal/Main.hs	2013-10-29 12:35:18.916340631 +0900
@@ -180,8 +180,8 @@
                             libsubdir = toPathTemplate "$pkgid",
                             docdir    = toPathTemplate $
                                             if relocatableBuild
-                                            then "$topdir/../doc/html/libraries/$pkgid"
-                                            else (myDocdir </> "$pkgid"),
+                                            then "$topdir/../doc/html/libraries/$pkg"
+                                            else (myDocdir </> "$pkg"),
                             htmldir   = toPathTemplate "$docdir"
                         }
                 progs = withPrograms lbi