diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -162,6 +162,15 @@
 it is up to you to make sure that the compiler, and packages you require are
 available, either globally, or provided by the `wrapper` script.
 
+#### Nix Wrapper Example
+
+The following snippet could act as a `wrapper` file to set up a suitable
+environment using `nix-shell`
+
+    #! /usr/bin/env nix-shell
+    #! nix-shell -i bash -p "(haskellPackages.ghcWithPackages (p: with p; [shh shh-extras]))"
+    exec "$@"
+
 ### Script Usage
 
 TODO: Fill this in once the user experience is better.
diff --git a/app/shh-app.hs b/app/shh-app.hs
--- a/app/shh-app.hs
+++ b/app/shh-app.hs
@@ -4,6 +4,7 @@
 import Shh
 import System.IO
 import System.Environment
+import System.Exit
 import System.IO.Temp
 import System.Directory
 import Data.Hashable (hash)
@@ -19,6 +20,9 @@
 defaultInitGhci = "\
 \:seti -XNoOverloadedLists\n\
 \import Shh\n\
+\ "
+
+extraInitGhci = "\
 \import Shh.Prompt\n\
 \:set prompt-function formatPrompt \"\\n\\ESC[1;32m[%u@%h:%w]λ \\ESC[0m\"\n\
 \:set prompt-cont \"| \"\n\
@@ -32,12 +36,15 @@
 
 debug = putStrLn
 
-writeIfMissing :: FilePath -> String -> IO ()
-writeIfMissing fp s = do
+doIfMissing :: FilePath -> IO () -> IO ()
+doIfMissing fp a = do
     doesFileExist fp >>= \case
         True -> pure ()
-        False -> writeFile fp s
+        False -> a
 
+writeIfMissing :: FilePath -> String -> IO ()
+writeIfMissing fp s = doIfMissing fp (writeFile fp s)
+
 main :: IO ()
 main = do
     a <- getArgs
@@ -57,13 +64,29 @@
     createDirectoryIfMissing False shhDir
 
     withCurrentDirectory shhDir $ do
-        writeIfMissing "init.ghci" defaultInitGhci
         writeIfMissing "wrapper" defaultWrapper
         setPermissions "wrapper" $
             setOwnerExecutable True $
             setOwnerReadable True $
             setOwnerWritable True $
             emptyPermissions
+        doIfMissing "init.ghci" $ do
+            catchFailure (exe wrapper "ghc-pkg" "latest" "shh") >>= \case
+                Left _ -> do
+                    putStrLn "Please make the shh and shh-extras packages available in the shh"
+                    putStrLn "environment (install it globally or modify the wrapper, see docs)."
+                    putStrLn "Aborting"
+                    exitFailure
+                Right _ -> writeFile "init.ghci" defaultInitGhci
+            catchFailure (exe wrapper "ghc-pkg" "latest" "shh-extras") >>= \case
+                Left _ -> do
+                    putStrLn "## WARNING ##########################################################"
+                    putStrLn "# You do not have the shh-extras library installed, and so we are"
+                    putStrLn "# generating a reduced functionality init.ghci file. To restore full"
+                    putStrLn "# functionality, install shh-extras and re-generate your init.ghci"
+                    putStrLn $ "# file by deleting " <> shhDir <> "/init.ghci and re-running shh"
+                    putStrLn "#####################################################################"
+                Right _ -> appendFile "init.ghci" extraInitGhci
         writeIfMissing "Shell.hs" defaultShell
 
     runProc $ mkProc' True wrapper ["ghci", "-ghci-script", shhDir <> "/init.ghci", shhDir <> "/Shell.hs"]
diff --git a/shh.cabal b/shh.cabal
--- a/shh.cabal
+++ b/shh.cabal
@@ -1,5 +1,5 @@
 name:                shh
-version:             0.3.1.0
+version:             0.3.1.1
 synopsis:            Simple shell scripting from Haskell
 description:         Provides a shell scripting environment for Haskell. It
                      helps you all external binaries, and allows you to