diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,10 +2,20 @@
 
 See full history at: <https://github.com/faylang/fay/commits>
 
+### 0.19.1 (2014-03-13)
+
+* Added Data.Char to fay-base
+
+Dependency bumps:
+* Allow `Cabal 1.19.*`
+* Allow `Process 1.2.*`
+
+
 #### 0.19.0.2 (2014-01-30)
 
 Bugfixes:
 * Don't export transcoding information for fay-base packages when compiling with --no-stdlib
+* Better error messages when forgetting the type signature in an FFI declaration
 
 #### 0.19.0.1 (2014-01-15)
 
diff --git a/fay.cabal b/fay.cabal
--- a/fay.cabal
+++ b/fay.cabal
@@ -1,5 +1,5 @@
 name:                fay
-version:             0.19.0.2
+version:             0.19.1
 synopsis:            A compiler for Fay, a Haskell subset that compiles to JavaScript.
 description:         Fay is a proper subset of Haskell which is type-checked
                      with GHC, and compiled to JavaScript. It is lazy, pure, has a Fay monad,
@@ -106,7 +106,7 @@
                      , Paths_fay
   ghc-options:       -O2 -Wall -fno-warn-name-shadowing
   build-depends:     base                 >= 4       && < 5
-                   , Cabal                              < 1.19
+                   , Cabal                              < 1.20
                    , aeson                              < 0.8
                    , attoparsec                         < 0.12
                    , bytestring                         < 0.11
@@ -122,7 +122,7 @@
                    , language-ecmascript  >= 0.15    && < 1.0
                    , mtl                                < 2.2
                    , pretty-show          >= 1.6     && < 1.7
-                   , process                            < 1.2
+                   , process                            < 1.3
                    , safe                               < 0.4
                    , split                              < 0.3
                    , syb                                < 0.5
diff --git a/src/Fay/Compiler.hs b/src/Fay/Compiler.hs
--- a/src/Fay/Compiler.hs
+++ b/src/Fay/Compiler.hs
@@ -213,4 +213,4 @@
 -- | Is the module a standard module, i.e., one that we'd rather not
 -- output code for if we're compiling separate files.
 anStdlibModule :: ModuleName a -> Bool
-anStdlibModule (ModuleName _ name) = name `elem` ["Prelude","FFI","Fay.FFI","Data.Data","Data.Ratio","Debug.Trace"]
+anStdlibModule (ModuleName _ name) = name `elem` ["Prelude","FFI","Fay.FFI","Data.Data","Data.Ratio","Debug.Trace","Data.Char"]
diff --git a/src/Fay/Compiler/Packages.hs b/src/Fay/Compiler/Packages.hs
--- a/src/Fay/Compiler/Packages.hs
+++ b/src/Fay/Compiler/Packages.hs
@@ -40,9 +40,12 @@
       exists <- mapM doesSourceDirExist includes
       if or exists
          then return (addConfigDirectoryIncludes (map (Just nameVer,) includes) config)
-         else error $ "unable to find (existing) package's share dir: " ++ name ++ "\n" ++
-                      "tried: " ++ unlines includes ++ "\n" ++
-                      "but none of them seem to have Haskell files in them."
+         else error $ concat
+                [ "unable to find (existing) package's share dir: ", name, "\n"
+                , "tried: ", unlines includes, "\n"
+                , "but none of them seem to have Haskell files in them.\n"
+                , "If you are using a sandbox you need to specify the HASKELL_PACKAGE_SANDBOX environment variable or use --package-conf."
+                ]
 
 -- | Does a directory exist and does it contain any Haskell sources?
 doesSourceDirExist :: FilePath -> IO Bool
diff --git a/tests/Char.hs b/tests/Char.hs
--- a/tests/Char.hs
+++ b/tests/Char.hs
@@ -2,8 +2,37 @@
 
 import FFI
 
+import Data.Char
+
 main :: Fay ()
 main = do
   print 'a'
   putStrLn ('a' : "bc")
   print (head "abc")
+  print (ord 'a')
+  print (chr 97)
+  print (chr (ord 'a'))
+  print (ord (chr 97))
+  print (isAscii 'a')
+  print (isAscii (chr 128))
+  print (isLatin1 (chr 255))
+  print (isLatin1 (chr 256))
+  print (toUpper 'a')
+  print (toLower 'A')
+  print (toLower (toUpper 'a'))
+  print (isAsciiLower 'a')
+  print (isAsciiLower 'A')
+  print (isAsciiUpper 'Z')
+  print (isAsciiUpper 'z')
+  print (isAsciiUpper (toUpper 'a'))
+  print (isAsciiUpper (toLower 'A'))
+  print (isAsciiLower (toLower 'Z'))
+  print (isAsciiLower (toUpper 'z'))
+  print (all isDigit "0123456789")
+  print (isDigit 'a')
+  print (all isOctDigit "01234567")
+  print (any isOctDigit ['8', '9'])
+  print (all isHexDigit "0123456789ABCDEFabcdef")
+  print (any isHexDigit "ghijklmnopqrstuvwxyzGHIJKLMNOPQRSTUVWXYZ")
+  print (all isSpace [' ', '\t', '\n', '\r', '\f', '\v', '\xa0', '\x3000'])
+
diff --git a/tests/Char.res b/tests/Char.res
--- a/tests/Char.res
+++ b/tests/Char.res
@@ -1,3 +1,29 @@
 a
 abc
 a
+97
+a
+a
+97
+true
+false
+true
+false
+A
+a
+a
+true
+false
+true
+false
+true
+false
+true
+false
+true
+false
+true
+false
+true
+false
+true