diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 Sifflet License
 
-Copyright (C) 2010 Gregory D. Weber
+Copyright (C) 2010-2012 Gregory D. Weber
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
diff --git a/Sifflet/Foreign/ToHaskell.hs b/Sifflet/Foreign/ToHaskell.hs
--- a/Sifflet/Foreign/ToHaskell.hs
+++ b/Sifflet/Foreign/ToHaskell.hs
@@ -12,7 +12,7 @@
     )
 where
 
-import Char (toUpper)
+import Data.Char (toUpper)
 import qualified Data.Map as M
 import System.FilePath (dropExtension, takeFileName)
 
diff --git a/Sifflet/Foreign/ToPython.hs b/Sifflet/Foreign/ToPython.hs
--- a/Sifflet/Foreign/ToPython.hs
+++ b/Sifflet/Foreign/ToPython.hs
@@ -17,7 +17,7 @@
 
 where
 
-import Char (isAlpha, isDigit, ord)
+import Data.Char (isAlpha, isDigit, ord)
 import Control.Monad (unless)
 import Data.Map ((!))
 import System.Directory (copyFile, doesFileExist)
diff --git a/Sifflet/Language/Expr.hs b/Sifflet/Language/Expr.hs
--- a/Sifflet/Language/Expr.hs
+++ b/Sifflet/Language/Expr.hs
@@ -44,7 +44,7 @@
 -- drop this after debugging:
 import System.IO.Unsafe(unsafePerformIO)
 
-import Data.Map as Map hiding (filter, map, null)
+import Data.Map as Map hiding (filter, foldl, map, null)
 import Data.List as List
 
 import Data.Number.Sifflet
diff --git a/Sifflet/Rendering/DrawTreeGraph.hs b/Sifflet/Rendering/DrawTreeGraph.hs
--- a/Sifflet/Rendering/DrawTreeGraph.hs
+++ b/Sifflet/Rendering/DrawTreeGraph.hs
@@ -8,7 +8,7 @@
 
 where
 
-import IO
+import System.IO
 import Data.IORef
 import System.Cmd
 import Graphics.UI.Gtk.Gdk.EventM
diff --git a/Sifflet/UI/Tool.hs b/Sifflet/UI/Tool.hs
--- a/Sifflet/UI/Tool.hs
+++ b/Sifflet/UI/Tool.hs
@@ -8,7 +8,6 @@
     , makeCopyTool
     , makeDeleteTool
     , makeDisconnectTool
-    , makeFixedArgTool
     , makeIfTool
     , makeMoveTool
     , showFunctionEntry
@@ -95,8 +94,8 @@
       ToolMove -> makeMoveTool
       ToolDelete -> makeDeleteTool
       ToolFunction funcname -> functionTool funcname
-      ToolLiteral e -> makeFixedLiteralTool e
-      ToolArg argname -> makeFixedArgTool argname
+      ToolLiteral e -> makeBoundLiteralTool e
+      ToolArg argname -> makeBoundArgTool argname
 
 
 defaultContextDescription :: String
@@ -231,8 +230,8 @@
           -- not in an edit frame, do nothing
           return canvas
 
-makeFixedLiteralTool :: Expr -> Tool
-makeFixedLiteralTool e =
+makeBoundLiteralTool :: Expr -> Tool
+makeBoundLiteralTool e =
     let enode node = ENode node EvalUntried
         addLitNode node vw toolContext _mods x y =
             case toolContext of
@@ -251,15 +250,15 @@
          EString s -> mktool (NString s)
          EList es -> if exprIsLiteral e
                      then mktool (NList es)
-                     else errcats ["makeFixedLiteralTool: ",
+                     else errcats ["makeBoundLiteralTool: ",
                                    "non-literal list expression",
                                    show e]
          _ ->
-             errcats ["makeFixedLiteralTool: non-literal or",
+             errcats ["makeBoundLiteralTool: non-literal or",
                       "extended expression", show e]
 
-makeFixedArgTool :: String -> Tool
-makeFixedArgTool label = 
+makeBoundArgTool :: String -> Tool
+makeBoundArgTool label = 
     let node = ENode (NSymbol (Symbol label)) EvalUntried
         addArgNode vw toolContext _mods x y =
             case toolContext of
diff --git a/Sifflet/UI/Window.hs b/Sifflet/UI/Window.hs
--- a/Sifflet/UI/Window.hs
+++ b/Sifflet/UI/Window.hs
@@ -673,7 +673,7 @@
 aboutText :: String
 aboutText =
     unlines ["Sifflet version " ++ showVersion Paths.version,
-             "Copyright (C) 2010 Gregory D. Weber",
+             "Copyright (C) 2010-2012 Gregory D. Weber",
              "",
              "BSD3 License",
              "",
diff --git a/sifflet-lib.cabal b/sifflet-lib.cabal
--- a/sifflet-lib.cabal
+++ b/sifflet-lib.cabal
@@ -1,5 +1,5 @@
 name: sifflet-lib
-version: 1.2.4
+version: 1.2.5
 cabal-version: >= 1.8
 build-type: Simple
 license: BSD3
@@ -16,13 +16,14 @@
   tests and its exporters.
 description: Supporting modules for the Sifflet visual, 
   functional programming language (Hackage 'sifflet' package).
+  Version 1.2.5: Compatibility with GHC 7.4.1.
   Version 1.2.4: Dependencies revised for compatibility with HXT 9.1.
   Version 1.2.3: Dependencies revised for compatibility with GHC 7.0
   and Haskell Platform 2011.2.
 category: 
   Language
   , Visual Programming
-tested-with: GHC == 6.12.3, GHC == 7.0.1
+tested-with: GHC == 7.4.1
 data-files: sifflet.scm sifflet.py siffml-1.0.dtd
 data-dir: datafiles
 extra-tmp-files:
@@ -33,7 +34,7 @@
 library
 
   build-depends:
-    base >= 4.0 && < 4.4,
+    base >= 4.0 && < 4.6,
 -- begin GTK stuff, these no longer need to have the same version
 -- numbers
     cairo >= 0.11 && < 0.13,
@@ -42,15 +43,14 @@
 -- end
     containers >= 0.2 && < 0.5,
     directory >= 1.0 && < 1.2,
-    filepath >= 1.1 && < 1.3,
+    filepath >= 1.1 && < 1.4,
     fgl >= 5.4 && < 5.5,
-    haskell98 >= 1.0.1 && < 1.2,
     hxt >= 9.0 && < 10.0,
     mtl >= 1.1 && < 2.1,
     parsec >= 2.1.0.1 && < 3.2, 
-    process >= 1.0 && < 1.1
+    process >= 1.0 && < 1.2
   if !os(windows)
-    build-depends: unix >= 2.3 && < 2.5
+    build-depends: unix >= 2.3 && < 2.6
   buildable: True
   extensions: ForeignFunctionInterface CPP
   ghc-options: -Wall