diff --git a/.github/workflows/test-flake.yml b/.github/workflows/test-flake.yml
index fcc5e57..ca82e63 100644
--- a/.github/workflows/test-flake.yml
+++ b/.github/workflows/test-flake.yml
@@ -8,9 +8,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
-    - uses: cachix/install-nix-action@v22
+    - uses: cachix/install-nix-action@v27
       with:
         github_access_token: ${{ secrets.GITHUB_TOKEN }}
     - run: nix flake check -Lv --allow-import-from-derivation --fallback --accept-flake-config
     - run: nix build .#transitive-anns -Lv --fallback --accept-flake-config
+    - run: nix build .#ghc94-transitive-anns -Lv --fallback --accept-flake-config
     - run: nix build .#ghc92-transitive-anns -Lv --fallback --accept-flake-config
diff --git a/flake.lock b/flake.lock
index 3eff135..db9e22a 100644
--- a/flake.lock
+++ b/flake.lock
@@ -3,11 +3,11 @@
     "flake-compat": {
       "flake": false,
       "locked": {
-        "lastModified": 1673956053,
-        "narHash": "sha256-4gtG9iQuiKITOjNQQeQIpoIB6b16fm+504Ch3sNKLd8=",
+        "lastModified": 1696426674,
+        "narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=",
         "owner": "edolstra",
         "repo": "flake-compat",
-        "rev": "35bb57c0c8d8b62bbfd284272c928ceb64ddbde9",
+        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
         "type": "github"
       },
       "original": {
@@ -16,24 +16,6 @@
         "type": "github"
       }
     },
-    "flake-utils": {
-      "inputs": {
-        "systems": "systems"
-      },
-      "locked": {
-        "lastModified": 1685518550,
-        "narHash": "sha256-o2d0KcvaXzTrPRIo0kOLV0/QXHhDQ5DTi+OxcjO8xqY=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "a1720a10a6cfe8234c0e93907ffe81be440f4cef",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
     "gitignore": {
       "inputs": {
         "nixpkgs": [
@@ -42,11 +24,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1660459072,
-        "narHash": "sha256-8DFJjXG8zqoONA1vXtgeKXy68KdJL5UaXR8NtVMUbx8=",
+        "lastModified": 1709087332,
+        "narHash": "sha256-HG2cCnktfHsKV0s4XW83gU3F57gaTljL9KNSuG6bnQs=",
         "owner": "hercules-ci",
         "repo": "gitignore.nix",
-        "rev": "a20de23b925fd8264fd7fad6454652e142fd7f73",
+        "rev": "637db329424fd7e46cf4185293b9cc8c88c95394",
         "type": "github"
       },
       "original": {
@@ -57,11 +39,11 @@
     },
     "haskell-flake": {
       "locked": {
-        "lastModified": 1698070134,
-        "narHash": "sha256-wJq3FmAcZ09FbkghNynvujhmxTAXHJLNWwX9G5oYi8M=",
+        "lastModified": 1716841745,
+        "narHash": "sha256-opRlnyY/f041VPH4MxgUwq5bl821LbN5ugKMSlh8smc=",
         "owner": "srid",
         "repo": "haskell-flake",
-        "rev": "f1380932a7b6ec360020acb87dd39331ebabb04c",
+        "rev": "5a86b9d5a1ad01e46d44af5fdaea59555b1199ca",
         "type": "github"
       },
       "original": {
@@ -72,11 +54,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1697915759,
-        "narHash": "sha256-WyMj5jGcecD+KC8gEs+wFth1J1wjisZf8kVZH13f1Zo=",
+        "lastModified": 1716914467,
+        "narHash": "sha256-KkT6YM/yNQqirtYj/frn6RRakliB8RDvGqVGGaNhdcU=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "51d906d2341c9e866e48c2efcaac0f2d70bfd43e",
+        "rev": "4a3fc4cf736b7d2d288d7a8bf775ac8d4c0920b4",
         "type": "github"
       },
       "original": {
@@ -88,45 +70,39 @@
     },
     "nixpkgs-lib": {
       "locked": {
-        "dir": "lib",
-        "lastModified": 1696019113,
-        "narHash": "sha256-X3+DKYWJm93DRSdC5M6K5hLqzSya9BjibtBsuARoPco=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "f5892ddac112a1e9b3612c39af1b72987ee5783a",
-        "type": "github"
+        "lastModified": 1714640452,
+        "narHash": "sha256-QBx10+k6JWz6u7VsohfSw8g8hjdBZEf8CFzXH1/1Z94=",
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs/archive/50eb7ecf4cd0a5756d7275c8ba36790e5bd53e33.tar.gz"
       },
       "original": {
-        "dir": "lib",
-        "owner": "NixOS",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs/archive/50eb7ecf4cd0a5756d7275c8ba36790e5bd53e33.tar.gz"
       }
     },
     "nixpkgs-stable": {
       "locked": {
-        "lastModified": 1685801374,
-        "narHash": "sha256-otaSUoFEMM+LjBI1XL/xGB5ao6IwnZOXc47qhIgJe8U=",
+        "lastModified": 1710695816,
+        "narHash": "sha256-3Eh7fhEID17pv9ZxrPwCLfqXnYP006RKzSs0JptsN84=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "c37ca420157f4abc31e26f436c1145f8951ff373",
+        "rev": "614b4613980a522ba49f0d194531beddbb7220d3",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-23.05",
+        "ref": "nixos-23.11",
         "repo": "nixpkgs",
         "type": "github"
       }
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1689261696,
-        "narHash": "sha256-LzfUtFs9MQRvIoQ3MfgSuipBVMXslMPH/vZ+nM40LkA=",
+        "lastModified": 1710765496,
+        "narHash": "sha256-p7ryWEeQfMwTB6E0wIUd5V2cFTgq+DRRBz2hYGnJZyA=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "df1eee2aa65052a18121ed4971081576b25d6b5c",
+        "rev": "e367f7a1fb93137af22a3908f00b9a35e2d286a7",
         "type": "github"
       },
       "original": {
@@ -141,11 +117,11 @@
         "nixpkgs-lib": "nixpkgs-lib"
       },
       "locked": {
-        "lastModified": 1696343447,
-        "narHash": "sha256-B2xAZKLkkeRFG5XcHHSXXcP7To9Xzr59KXeZiRf4vdQ=",
+        "lastModified": 1715865404,
+        "narHash": "sha256-/GJvTdTpuDjNn84j82cU6bXztE0MSkdnTWClUCRub78=",
         "owner": "hercules-ci",
         "repo": "flake-parts",
-        "rev": "c9afaba3dfa4085dbd2ccb38dfade5141e33d9d4",
+        "rev": "8dc45382d5206bd292f9c2768b8058a8fd8311d9",
         "type": "github"
       },
       "original": {
@@ -157,17 +133,16 @@
     "pre-commit-hooks": {
       "inputs": {
         "flake-compat": "flake-compat",
-        "flake-utils": "flake-utils",
         "gitignore": "gitignore",
         "nixpkgs": "nixpkgs_2",
         "nixpkgs-stable": "nixpkgs-stable"
       },
       "locked": {
-        "lastModified": 1697746376,
-        "narHash": "sha256-gu77VkgdfaHgNCVufeb6WP9oqFLjwK4jHcoPZmBVF3E=",
+        "lastModified": 1716213921,
+        "narHash": "sha256-xrsYFST8ij4QWaV6HEokCUNIZLjjLP1bYC60K8XiBVA=",
         "owner": "cachix",
         "repo": "pre-commit-hooks.nix",
-        "rev": "8cc349bfd082da8782b989cad2158c9ad5bd70fd",
+        "rev": "0e8fcc54b842ad8428c9e705cb5994eaf05c26a0",
         "type": "github"
       },
       "original": {
@@ -183,21 +158,6 @@
         "parts": "parts",
         "pre-commit-hooks": "pre-commit-hooks"
       }
-    },
-    "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 b5b1874..8af699e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -26,7 +26,6 @@
             hlint.enable = true;
 
             alejandra.enable = true;
-            statix.enable = true;
             deadnix.enable = true;
           };
         };
@@ -38,12 +37,18 @@
           devShell.mkShellArgs.shellHook = config.pre-commit.installationScript;
         };
 
-        haskellProjects.default = {
+        haskellProjects.ghc94 = {
           packages = {};
           settings = {};
           basePackages = pkgs.haskell.packages.ghc94;
           devShell.mkShellArgs.shellHook = config.pre-commit.installationScript;
         };
+        haskellProjects.default = {
+          packages = {};
+          settings = {};
+          basePackages = pkgs.haskellPackages;
+          devShell.mkShellArgs.shellHook = config.pre-commit.installationScript;
+        };
       };
     };
 }
diff --git a/src/TransitiveAnns/Plugin/Annotations.hs b/src/TransitiveAnns/Plugin/Annotations.hs
index 1e7b0ab..970bf0f 100644
--- a/src/TransitiveAnns/Plugin/Annotations.hs
+++ b/src/TransitiveAnns/Plugin/Annotations.hs
@@ -27,7 +27,7 @@ import qualified TransitiveAnns.Types as TA
 ------------------------------------------------------------------------------
 -- | Get the name and set of referenced variables for a binding.
 hsBinds :: HsBindLR GhcTc GhcTc -> Maybe (Var, Set Var)
-hsBinds (FunBind _ (L _ gl) mg _) = Just (gl, getVars mg)
+hsBinds FunBind {fun_id = (L _ gl), fun_matches = mg} = Just (gl, getVars mg)
 hsBinds PatBind{} = Nothing
 hsBinds VarBind{} = Nothing
 #if MIN_VERSION_GLASGOW_HASKELL(9,4,0,0)