diff --git a/pkgs/development/libraries/haskell/loop/default.nix b/pkgs/development/libraries/haskell/loop/default.nix
new file mode 100644
index 000000000000..88edb1909a5d
--- /dev/null
+++ b/pkgs/development/libraries/haskell/loop/default.nix
@@ -0,0 +1,16 @@
+# This file was auto-generated by cabal2nix. Please do NOT edit manually!
+
+{ cabal, hspec, mtl }:
+
+cabal.mkDerivation (self: {
+  pname = "loop";
+  version = "0.2.0";
+  sha256 = "11ifqahlg9ky5klid1fhsyfvfb6w8yb0dsy43s0cxcmldbw3qv5x";
+  testDepends = [ hspec mtl ];
+  meta = {
+    homepage = "https://github.com/nh2/loop";
+    description = "Fast loops (for when GHC can't optimize forM_)";
+    license = self.stdenv.lib.licenses.mit;
+    platforms = self.ghc.meta.platforms;
+  };
+})
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 6561c436b07a..aeeb4dc36641 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1509,6 +1509,8 @@ self : let callPackage = x : y : modifyPrio (newScope self x y); in
 
   logict = callPackage ../development/libraries/haskell/logict {};
 
+  loop = callPackage ../development/libraries/haskell/loop {};
+
   lushtags = callPackage ../development/libraries/haskell/lushtags {};
 
   lzmaEnumerator = callPackage ../development/libraries/haskell/lzma-enumerator {};