diff --git a/pkgs/development/libraries/haskell/dual-tree/default.nix b/pkgs/development/libraries/haskell/dual-tree/default.nix
new file mode 100644
index 000000000000..f1206fd822ee
--- /dev/null
+++ b/pkgs/development/libraries/haskell/dual-tree/default.nix
@@ -0,0 +1,13 @@
+{ cabal, monoidExtras, newtype, semigroups }:
+
+cabal.mkDerivation (self: {
+  pname = "dual-tree";
+  version = "0.1.0.0";
+  sha256 = "0av525gjxzd2hhrg5da647chwbv4j30gccaff2b3n5qijzy8l167";
+  buildDepends = [ monoidExtras newtype semigroups ];
+  meta = {
+    description = "Rose trees with cached and accumulating monoidal annotations";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+  };
+})
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 0ab26af572bd..ccbcfc169024 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -735,6 +735,8 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
 
   dstring = callPackage ../development/libraries/haskell/dstring {};
 
+  dualTree = callPackage ../development/libraries/haskell/dual-tree {};
+
   editDistance = callPackage ../development/libraries/haskell/edit-distance {};
 
   editline = callPackage ../development/libraries/haskell/editline {};