diff --git a/mueval.cabal b/mueval.cabal
--- a/mueval.cabal
+++ b/mueval.cabal
@@ -1,5 +1,5 @@
 name:                mueval
-version:             0.2
+version:             0.2.1
 
 license:             BSD3
 license-file:        LICENSE
@@ -26,7 +26,7 @@
 Library
         exposed-modules:     Mueval.Context, Mueval.Interpreter,
                              Mueval.ParseArgs, Mueval.Resources
-        build-Depends:       base, directory, mtl, unix, hint>0.2
+        build-Depends:       base, directory, mtl, unix, hint>0.2, show
         ghc-options:         -Wall
 
 Executable mueval