1 files changed, 1 insertions, 0 deletions

diff --git a/shell.nix b/shell.nix
index 747ab7b..1e9307e 100644
--- a/shell.nix
+++ b/shell.nix
@@ -6,6 +6,7 @@ let
   packages = ps: with ps; [
     cabal-install hlint cabal2nix
     hspec QuickCheck quickcheck-instances
+    hspec-contrib temporary
   ] ++ (builtins.attrValues (import ./default.nix { inherit pkgs; }));
   ghc = pkgs.haskell.packages.${compilerName}.ghcWithPackages packages;
 in