1 files changed, 3 insertions, 1 deletions

diff --git a/shell.nix b/shell.nix
index 7f16236..d1ef9ce 100644
--- a/shell.nix
+++ b/shell.nix
@@ -11,6 +11,8 @@ pkgs.stdenv.mkDerivation {
                   pkgs.gcc
                   (pkgs.callPackage ./mars.nix {})
                   pkgs.sqlite
-                  pkgs.ghc
+                  (pkgs.haskellPackages.ghcWithPackages (p:
+                    with p; [ yesod
+                            ]))
                 ];
 }