diff --git a/pkgs/development/libraries/haskell/foldl/default.nix b/pkgs/development/libraries/haskell/foldl/default.nix
new file mode 100644
index 000000000000..44312abb35be
--- /dev/null
+++ b/pkgs/development/libraries/haskell/foldl/default.nix
@@ -0,0 +1,13 @@
+{ cabal }:
+
+cabal.mkDerivation (self: {
+  pname = "foldl";
+  version = "1.0.0";
+  sha256 = "0r9lkyw33231nfl9ly25hk2i7k3c8ssmng473xvk76zkcrksj131";
+  meta = {
+    description = "Composable, streaming, and efficient left folds";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+    maintainers = [ self.stdenv.lib.maintainers.ocharles ];
+  };
+})
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index a6439cb88312..e775ce4c0f98 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1029,6 +1029,8 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
 
   fingertree = callPackage ../development/libraries/haskell/fingertree {};
 
+  foldl = callPackage ../development/libraries/haskell/foldl {};
+
   forceLayout = callPackage ../development/libraries/haskell/force-layout {};
 
   free = callPackage ../development/libraries/haskell/free {};