diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 9841264cf5c..69ec24e3c10 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -2767,6 +2767,7 @@ self: super: {
   # Tests fail due to the newly-build fourmolu not being in PATH
   # https://github.com/fourmolu/fourmolu/issues/231
   fourmolu_0_14_0_0 = dontCheck super.fourmolu_0_14_0_0;
+  fourmolu_0_13_1_0 = dontCheck super.fourmolu_0_13_1_0;
 
   # Merged upstream, but never released. Allows both intel and aarch64 darwin to build.
   # https://github.com/vincenthz/hs-gauge/pull/106
diff --git a/pkgs/development/haskell-modules/configuration-ghc-9.6.x.nix b/pkgs/development/haskell-modules/configuration-ghc-9.6.x.nix
index 82c5878a3ca..e9f420db268 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-9.6.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-9.6.x.nix
@@ -175,7 +175,7 @@ self: super: {
       hls-floskell-plugin = null;
     };
 
-  fourmolu = super.fourmolu_0_14_0_0;
+  fourmolu = super.fourmolu_0_13_1_0;
   ormolu = super.ormolu_0_7_2_0;
   stylish-haskell = super.stylish-haskell_0_14_5_0;
 
diff --git a/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml b/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
index 91c40b441eb..17fdbb5bcad 100644
--- a/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
+++ b/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
@@ -122,6 +122,7 @@ extra-packages:
   - ormolu == 0.5.2.0                   # 2023-08-08: for hls on ghc 9.0 and 9.2
   - fourmolu == 0.9.0.0                 # 2022-09-21: for hls on ghc 8.10
   - fourmolu == 0.10.1.0                # 2023-04-18: for hls on ghc 9.0 and 9.2
+  - fourmolu == 0.13.*                  # 2023-09-16: latest version compatible with hls 2.2.* on ghc 9.6
   - mod == 0.1.2.2                      # needed for hls on ghc 8.10
   - pantry == 0.5.2.1                   # needed for stack-2.7.3
   - path == 0.9.0                       # 2021-12-03: path version building with stackage genvalidity and GHC 9.0.2
diff --git a/pkgs/development/haskell-modules/hackage-packages.nix b/pkgs/development/haskell-modules/hackage-packages.nix
index 340044a6147..f374c132175 100644
--- a/pkgs/development/haskell-modules/hackage-packages.nix
+++ b/pkgs/development/haskell-modules/hackage-packages.nix
@@ -108742,6 +108742,43 @@ self: {
        mainProgram = "fourmolu";
      }) {};
 
+  "fourmolu_0_13_1_0" = callPackage
+    ({ mkDerivation, aeson, ansi-terminal, array, base, binary
+     , bytestring, Cabal-syntax, containers, deepseq, Diff, directory
+     , file-embed, filepath, ghc-lib-parser, hspec, hspec-discover
+     , hspec-megaparsec, megaparsec, MemoTrie, mtl, optparse-applicative
+     , path, path-io, pretty, process, QuickCheck, scientific, syb
+     , temporary, text, th-env, yaml
+     }:
+     mkDerivation {
+       pname = "fourmolu";
+       version = "0.13.1.0";
+       sha256 = "05vkqygrmgfgmsd8a4vxq8mq0c1z9cb3hja28aszd6llfv427dm1";
+       revision = "1";
+       editedCabalFile = "0jqgixycw8cv0q7amx5fs4ml9knql70ghg31br3hjkcy0vb2hi5v";
+       isLibrary = true;
+       isExecutable = true;
+       libraryHaskellDepends = [
+         aeson ansi-terminal array base binary bytestring Cabal-syntax
+         containers deepseq Diff directory file-embed filepath
+         ghc-lib-parser megaparsec MemoTrie mtl scientific syb text yaml
+       ];
+       executableHaskellDepends = [
+         base Cabal-syntax containers directory filepath ghc-lib-parser
+         optparse-applicative text th-env yaml
+       ];
+       testHaskellDepends = [
+         base bytestring Cabal-syntax containers Diff directory filepath
+         ghc-lib-parser hspec hspec-megaparsec megaparsec path path-io
+         pretty process QuickCheck temporary text yaml
+       ];
+       testToolDepends = [ hspec-discover ];
+       description = "A formatter for Haskell source code";
+       license = lib.licenses.bsd3;
+       hydraPlatforms = lib.platforms.none;
+       mainProgram = "fourmolu";
+     }) {};
+
   "fourmolu_0_14_0_0" = callPackage
     ({ mkDerivation, aeson, ansi-terminal, array, base, binary
      , bytestring, Cabal-syntax, containers, deepseq, Diff, directory