2 files changed, 2 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
index cf602f4..fb1339f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 **/result
 **/result-*
 **/dist/
+**/.cabal-sandbox
diff --git a/shell.nix b/shell.nix
index c48100d..6be224b 100644
--- a/shell.nix
+++ b/shell.nix
@@ -5,6 +5,7 @@
 let
   packages = ps: with ps; [
     cabal-install hlint cabal2nix
+    hspec QuickCheck quickcheck-instances
   ] ++ (builtins.attrValues (import ./default.nix {}));
   ghc = pkgs.haskell.packages.${compilerName}.ghcWithHoogle packages;
 in