1 files changed, 1 insertions, 1 deletions

diff --git a/shell.nix b/shell.nix
index 811b2ea..156d520 100644
--- a/shell.nix
+++ b/shell.nix
@@ -11,7 +11,7 @@ pkgs.stdenv.mkDerivation rec {
                   (pkgs.callPackage ./mars.nix {})
                   pkgs.sqlite
                   (pkgs.haskellPackages.ghcWithPackages (p:
-                    with p; [ yesod yesod-bin pandoc
+                    with p; [ yesod yesod-bin pandoc monad-par
                             ]))
                   (pkgs.texlive.combine {
                     inherit (pkgs.texlive) scheme-small libertine tipa cm-super context bussproofs mweights fontaxes backnaur;