Working math support

1 files changed, 3 insertions, 2 deletions

diff --git a/shell.nix b/shell.nix
index e17c3e6..9e363eb 100644
--- a/shell.nix
+++ b/shell.nix
@@ -3,8 +3,9 @@
 
 pkgs.stdenv.mkDerivation rec {
   name = "dirty-haskell";
-  buildInputs = [ (import ./default.nix {}).dirty-haskell-wrapper
-                ];
+  buildInputs = with (import ./default.nix {}); [ dirty-haskell-wrapper
+                                                  (pkgs.haskellPackages.ghcWithPackages (p: with p; [ regex-tdfa ]))
+                                                ];
   shellHook = ''
     export PROMPT_INFO=${name}
   '';