--- ghc-8.0.1.20161117/libraries/Cabal/Cabal/Distribution/Simple/InstallDirs.hs~	2016-11-18 07:08:46.000000000 +0900
+++ ghc-8.0.1.20161117/libraries/Cabal/Cabal/Distribution/Simple/InstallDirs.hs	2016-12-07 18:19:02.670468156 +0900
@@ -186,7 +186,7 @@
            JHC    -> "$compiler"
            LHC    -> "$compiler"
            UHC    -> "$pkgid"
-           _other -> "$abi",
+           _other -> "$compiler/$pkgkey",
       libexecdir   = case buildOS of
         Windows   -> "$prefix" </> "$libname"
         _other    -> "$prefix" </> "libexec",