diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index e0e73ba..125a27b 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -4,6 +4,7 @@ on:
   push:
     branches:
       - main
+      - ghc-9.6
 
   pull_request:
     branches:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3d96316..512e2e0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,16 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to the
 [Haskell Package Versioning Policy](https://pvp.haskell.org/).
 
+## [0.9] -- 2023-09-16
+### Changed
+* Updated tools:
+  * `cabal-fmt: 0.1.6 -> 0.1.7`
+  * `fourmolu: 0.10.1.0 -> 0.13.1.0`
+  * `hlint: 3.5 -> 3.6.1`
+  * `implcit-hie: 0.1.2.7 -> 0.1.4.0`
+  * `ormolu: 0.5.3.0 -> 0.7.1.0`
+  * `stylish: 0.14.3.0 -> 0.14.5.0`
+
 ## [0.8] -- 2023-02-20
 ### Changed
 * Updated tools:
@@ -94,6 +104,7 @@ and this project adheres to the
 
 * First version. Released on an unsuspecting world.
 
+[0.9]: https://github.com/tbidne/nix-hs-tools/compare/0.8...0.9
 [0.8]: https://github.com/tbidne/nix-hs-tools/compare/0.7...0.8
 [0.7]: https://github.com/tbidne/nix-hs-tools/compare/0.6.1...0.7
 [0.6.1]: https://github.com/tbidne/nix-hs-tools/compare/0.6...0.6.1
diff --git a/README.md b/README.md
index 9b10e2a..1d99569 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 # nix-hs-tools
 
 [![GitHub release (latest SemVer)](https://img.shields.io/github/v/tag/tbidne/nix-hs-tools?include_prereleases&sort=semver)](https://github.com/tbidne/nix-hs-tools/releases/)
-![haskell](https://img.shields.io/static/v1?label=&message=9.4&logo=haskell&logoColor=655889&labelColor=2f353e&color=655889)
+![haskell](https://img.shields.io/static/v1?label=&message=9.6&logo=haskell&logoColor=655889&labelColor=2f353e&color=655889)
 [![ci](http://img.shields.io/github/actions/workflow/status/tbidne/nix-hs-tools/ci.yaml?branch=main&logoColor=85c5e7&labelColor=2f353c)](https://github.com/tbidne/nix-hs-tools/actions/workflows/ci.yaml)
 [![MIT](https://img.shields.io/github/license/tbidne/nix-hs-tools?color=blue)](https://opensource.org/licenses/MIT)
 
@@ -74,7 +74,7 @@ nix run github:tbidne/nix-hs-tools/0.4.0.1#<tool> -- <args>
 
 **Source:** https://github.com/phadej/cabal-fmt
 
-**Version:** 0.1.6
+**Version:** 0.1.7
 
 **Description:** The `cabal-fmt` formatter for `cabal` files. By default, searches the current directory for `*.cabal` files. Otherwise the search directory can be specified with `--dir DIR`.
 
@@ -94,7 +94,7 @@ nix run github:tbidne/nix-hs-tools#cabal-fmt -- --dir ../foo --check
 
 **Source:** https://github.com/fourmolu/fourmolu
 
-**Version:** 0.10.1.0
+**Version:** 0.13.1.0
 
 **Description:** The `fourmolu` code formatter for haskell source files. Runs `fourmolu` recursively on all `hs` files in the specified directory, ignoring `dist-newstyle` and `.stack-work`. By default runs on the current directory, though it can be specified with `--dir`.
 
@@ -117,7 +117,7 @@ nix run github:tbidne/nix-hs-tools#fourmolu -- --no-cabal --ghc-opt -XImportQual
 
 **Source:** https://github.com/tweag/ormolu
 
-**Version:** 0.5.3.0
+**Version:** 0.7.1.0
 
 **Description:** The `ormolu` code formatter for haskell source files. Runs `ormolu` recursively on all `hs` files in the specified directory, ignoring `dist-newstyle` and `.stack-work`. By default runs on the current directory, though it can be specified with `--dir`.
 
@@ -140,7 +140,7 @@ nix run github:tbidne/nix-hs-tools#ormolu -- --no-cabal --ghc-opt -XImportQualif
 
 **Source:** https://github.com/haskell/stylish-haskell
 
-**Version:** 0.14.3.0
+**Version:** 0.14.5.0
 
 **Description:** The `stylish-haskell` code formatter for haskell source files. Runs `stylish-haskell` recursively on all `hs` files in the specified directory, ignoring `dist-newstyle` and `.stack-work`. By default runs on the current directory, though it can be specified with `--dir`.
 
@@ -159,7 +159,7 @@ nix run github:tbidne/nix-hs-tools#stylish -- --inplace
 
 **Source:** https://github.com/ndmitchell/hlint
 
-**Version:** 3.5
+**Version:** 3.6.1
 
 **Description:** The `hlint` linter. Runs recursively on the current directory, though this can be overridden with `--dir`. Ignores `dist-newstyle` and `stack-work`.
 
diff --git a/flake.lock b/flake.lock
index 6f5f869..a7fe431 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,12 +1,15 @@
 {
   "nodes": {
     "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
       "locked": {
-        "lastModified": 1676283394,
-        "narHash": "sha256-XX2f9c3iySLCw54rJ/CZs+ZK6IQy7GXNY4nSOyu2QG4=",
+        "lastModified": 1694529238,
+        "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "3db36a8b464d0c4532ba1c7dda728f4576d6d073",
+        "rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
         "type": "github"
       },
       "original": {
@@ -17,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1676721149,
-        "narHash": "sha256-mN2EpTGxxVNnFZLoLWRwh6f7UWhXy4qE+wO2CZyrXps=",
+        "lastModified": 1694767346,
+        "narHash": "sha256-5uH27SiVFUwsTsqC5rs3kS7pBoNhtoy9QfTP9BmknGk=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "5f4e07deb7c44f27d498f8df9c5f34750acf52d2",
+        "rev": "ace5093e36ab1e95cb9463863491bee90d5a4183",
         "type": "github"
       },
       "original": {
@@ -36,6 +39,21 @@
         "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs"
       }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
     }
   },
   "root": "root",
diff --git a/flake.nix b/flake.nix
index 9b93901..43cc022 100644
--- a/flake.nix
+++ b/flake.nix
@@ -11,19 +11,12 @@
     let
       haskell-overlay = final: prev:
         let
-          hp = final.pkgs.haskell.packages.ghc944;
+          hp = final.pkgs.haskell.packages.ghc962;
         in
         {
-          # overrides
-          apply-refact = hp.apply-refact_0_11_0_0;
-          # TODO: Update
-          fourmolu = hp.fourmolu;
-          ormolu = hp.ormolu_0_5_3_0;
-          hlint = hp.hlint_3_5;
-
           # adding to pkgs so we can easily access versions.
           cabal-fmt = hp.cabal-fmt;
-          implicit-hie = hp.implicit-hie;
+          implicit-hie = hp.implicit-hie_0_1_4_0;
 
           # disable all tests
           mkDerivation = args: prev.mkDerivation (args // {
@@ -39,8 +32,7 @@
       };
 
       # convenient aliases used in multiple tools
-      excluded-dirs = "! -path \"./.*\" ! -path \"./*dist-newstyle/*\" ! -path \"./*stack-work/*\"";
-      find-hs-non-build = "${pkgs.findutils}/bin/find $dir -type f -name \"*.hs\" ${excluded-dirs}";
+      find-hs-non-build = "${pkgs.fd}/bin/fd $dir -e hs";
 
       # misc
       title = "nix-hs-tools";
@@ -80,7 +72,7 @@
       version = "0.8";
 
       # tools
-      cabal-fmt = import ./tools/cabal-fmt.nix { inherit pkgs excluded-dirs; };
+      cabal-fmt = import ./tools/cabal-fmt.nix { inherit pkgs; };
       fourmolu = import ./tools/fourmolu.nix { inherit pkgs find-hs-non-build; };
       hie = import ./tools/hie.nix { inherit pkgs; };
       hlint = import ./tools/hlint.nix { inherit find-hs-non-build pkgs; };
diff --git a/tools/cabal-fmt.nix b/tools/cabal-fmt.nix
index ffd5dbf..4a676e7 100644
--- a/tools/cabal-fmt.nix
+++ b/tools/cabal-fmt.nix
@@ -1,9 +1,7 @@
-{ excluded-dirs
-, pkgs
-}:
+{ pkgs }:
 
 let
-  find-cabal-non-build = "${pkgs.findutils}/bin/find $dir -type f -name \"*.cabal\" ${excluded-dirs}";
+  find-cabal-non-build = "${pkgs.fd}/bin/fd $dir -e .cabal";
 in
 pkgs.writeShellScript "cabal-fmt.sh" ''
   set -e
@@ -22,6 +20,5 @@ pkgs.writeShellScript "cabal-fmt.sh" ''
     shift
   done
 
-  ${find-cabal-non-build} | ${pkgs.findutils}/bin/xargs \
-    ${pkgs.haskellPackages.cabal-fmt}/bin/cabal-fmt ''${args[@]}
+  ${pkgs.haskellPackages.cabal-fmt}/bin/cabal-fmt ''${args[@]} $(${find-cabal-non-build})
 ''
diff --git a/tools/fourmolu.nix b/tools/fourmolu.nix
index 0ce1c04..7947ecb 100644
--- a/tools/fourmolu.nix
+++ b/tools/fourmolu.nix
@@ -19,6 +19,5 @@ pkgs.writeShellScript "fourmolu.sh" ''
     shift
   done
 
-  ${find-hs-non-build} | ${pkgs.findutils}/bin/xargs \
-    ${pkgs.fourmolu}/bin/fourmolu ''${args[@]}
+  ${pkgs.fourmolu}/bin/fourmolu ''${args[@]} $(${find-hs-non-build})
 ''
diff --git a/tools/ormolu.nix b/tools/ormolu.nix
index 61178f8..d5354c7 100644
--- a/tools/ormolu.nix
+++ b/tools/ormolu.nix
@@ -19,6 +19,5 @@ pkgs.writeShellScript "ormolu.sh" ''
     shift
   done
 
-  ${find-hs-non-build} | ${pkgs.findutils}/bin/xargs \
-    ${pkgs.ormolu}/bin/ormolu ''${args[@]}
+  ${pkgs.ormolu}/bin/ormolu ''${args[@]} $(${find-hs-non-build})
 ''
diff --git a/tools/stylish.nix b/tools/stylish.nix
index f9fdd19..1cc5db9 100644
--- a/tools/stylish.nix
+++ b/tools/stylish.nix
@@ -19,6 +19,5 @@ pkgs.writeShellScript "stylish.sh" ''
     shift
   done
 
-  ${find-hs-non-build} | ${pkgs.findutils}/bin/xargs \
-    ${pkgs.stylish-haskell}/bin/stylish-haskell ''${args[@]}
+  ${pkgs.stylish-haskell}/bin/stylish-haskell ''${args[@]} $(${find-hs-non-build})
 ''