@@ -68,6 +68,15 @@ let
6868 rev = "480a73137e9b38ad3f1bc2c628847953d2fb3e25";
6969 sha256 = "0dpwi5ffs88brl3lz51bwb004c6zm8ds8pkw1vzsg2a6aaiyhlzl";
7070 }) {});
71+
72+ monoidal-containers =
73+ let src = pkgs.fetchFromGitHub {
74+ owner = "obsidiansystems";
75+ repo = "monoidal-containers";
76+ rev = "af5f6cedd1acd8725b19fd6a0277f83906603491";
77+ sha256 = "11v20ing8lrb5ccf6g9iihwcw5d22yj2ifw15v04ypn19y8kariw";
78+ };
79+ in pkgs.haskell.lib.dontCheck (self.callCabal2nix "monoidal-containers" src {});
7180 };
7281
7382 cleanSource = builtins.filterSource (name: _: let baseName = builtins.baseNameOf name; in !(