diff --git a/examples/main.hs b/examples/main.hs
--- a/examples/main.hs
+++ b/examples/main.hs
@@ -37,15 +37,16 @@
       dbg "setting up scenario"
   run $ do
     ancestors "pong" >>= liftIO . print . (\n ->  show n ++ " ancestor(s)") . length
-    (Just str :: Maybe String) <- getVar "hello"
-    liftIO . print . ("hello "++) $ str
+    (Just who :: Maybe String) <- getVar "hello"
+    liftIO . print . ("hello "++) $ who
     (StringParam srv) <- param "destination"
     case srv of
         "failure.example" -> err "noooo"
-        str               -> dbg $ T.append "mimic sending ping to " str
+        host              -> dbg $ T.append "mimic sending ping to " host
     writeResult "raw-result" "a sort of result stored as a separate file"
   teardown $ dbg "here we could run some teardown action"
-  recover $ \err -> dbg $ T.append "here we could recover from error: " (T.pack $ show err)
-  analyze $ liftIO . print $ "analyze action"
+  recover $ \e -> dbg $ T.append "here we could recover from error: " (T.pack $ show e)
+  analyze $ liftIO . print $ ("analyze action" :: String)
 
+main :: IO ()
 main = defaultMain [ping, pong]
diff --git a/laborantin-hs.cabal b/laborantin-hs.cabal
--- a/laborantin-hs.cabal
+++ b/laborantin-hs.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                laborantin-hs
-version:             0.1.5.0
+version:             0.1.5.2
 synopsis:            an experiment management framework
 description:         
     Laborantin is a framework and DSL to run and manage results from scientific
@@ -62,7 +62,7 @@
   exposed-modules:     Laborantin, Laborantin.DSL, Laborantin.Implementation, Laborantin.Types, Laborantin.CLI, Laborantin.Query
   other-modules:       Laborantin.Query.Parse, Laborantin.Query.Interpret
   other-extensions:    FlexibleContexts, OverloadedStrings, TupleSections
-  build-depends:       base >=4.6 && <4.8, transformers >=0.3 && <0.4, mtl >=2.1 && <2.2, containers >=0.5 && <0.6, text >=0.11 && <0.12, bytestring >=0.10 && <0.11, aeson >=0.6 && <0.7, uuid >=1.2 && <1.3, directory >=1.2 && <1.3, random >=1.0 && <1.1, hslogger >=1.2 && <1.3, cmdlib >= 0.3.5, split >= 0.2.2, time >= 1.4.0.1, parsec >= 3.1.0, old-locale >=1.0.0.5, async >= 2.0.1.0
+  build-depends:       base >=4.6 && <4.8, transformers >=0.3 && <0.4, mtl >=2.1 && <2.2, containers >=0.5 && <0.6, text >= 0.11 && <1.2, bytestring >=0.10 && <0.11, aeson >=0.6 && <0.8, uuid >=1.2 && <1.3, directory >=1.2 && <1.3, random >=1.0 && <1.1, hslogger >=1.2 && <1.3, cmdlib >= 0.3.5, split >= 0.2.2, time >= 1.4.0.1, parsec >= 3.1.0, old-locale >=1.0.0.5, async >= 2.0.1.0
   -- hs-source-dirs:      
   default-language:    Haskell2010
 
@@ -70,5 +70,5 @@
   main-is: main.hs
   ghc-options: -Wall
   hs-source-dirs: examples
-  build-depends:       base >=4.6 && <4.8, transformers >=0.3 && <0.4, mtl >=2.1 && <2.2, containers >=0.5 && <0.6, text >=0.11 && <0.12, bytestring >=0.10 && <0.11, aeson >=0.6 && <0.7, uuid >=1.2 && <1.3, directory >=1.2 && <1.3, random >=1.0 && <1.1, hslogger >=1.2 && <1.3, cmdlib >= 0.3.5, split >= 0.2.2, laborantin-hs >= 0.1.1.2
+  build-depends:       base >=4.6 && <4.8, transformers >=0.3 && <0.4, mtl >=2.1 && <2.2, containers >=0.5 && <0.6, text >=0.11 && <1.2, bytestring >=0.10 && <0.11, aeson >=0.6 && <0.8, uuid >=1.2 && <1.3, directory >=1.2 && <1.3, random >=1.0 && <1.1, hslogger >=1.2 && <1.3, cmdlib >= 0.3.5, split >= 0.2.2, laborantin-hs >= 0.1.5.1
   default-language:    Haskell2010