Update ghc-compat version

Author: augustss

src/MicroCabal/Main.hs

@@ -171,7 +171,7 @@ distPkgs =
 --  , StackagePackage "deepseq"      (makeVersion [1,6,0,0])  False []  -- built in
   , StackagePackage "exceptions"   (makeVersion [0,10,11])    False []
   , StackagePackage "filepath"     (makeVersion [1,5,5,0])    False []
-  , StackagePackage "ghc-compat"   (makeVersion [0,5,7,0])    False []
+  , StackagePackage "ghc-compat"   (makeVersion [0,5,8,0])    False []
   , StackagePackage "mtl"          (makeVersion [2,3,2])      False []
   , StackagePackage "os-string"    (makeVersion [2,0,10])     False []
   , StackagePackage "parsec"       (makeVersion [3,1,18,0])   False []
@@ -241,7 +241,7 @@ findCabalFile _env = do
   case filter (".cabal" `isSuffixOf`) ns of
     []  -> error "no PKG.cabal file"
     [n] -> return n
-    _   -> error "multiple PKG.cabal file"
+    xs  -> error $ "multiple PKG.cabal files: " ++ show xs
 
 cmdBuild :: Env -> [String] -> IO ()
 cmdBuild env [] = build env