diff --git a/flake.nix b/flake.nix
index 7c10fab..6d16343 100644
--- a/flake.nix
+++ b/flake.nix
@@ -10,9 +10,18 @@
     flake-utils.lib.eachDefaultSystem (system:
       let
         pkgs = nixpkgs.legacyPackages.${system};
+        granitePkg = pkgs.fetchFromGitHub {
+          repo = "granite";
+          owner = "mchav";
+          rev = "main";
+          hash = "sha256-ypDiV99w2J8q7XcMpFWkv0kEm2dtWZduWIkAsuXDHEo=";
+        };
 
-        hsPkgs = pkgs.haskellPackages.extend (self: super: {
-          dataframe = self.callCabal2nix "dataframe" ./. { };
+        hsPkgs = pkgs.haskellPackages.extend (self: super: rec {
+          granite = self.callCabal2nix "granite" granitePkg { };
+          dataframe = self.callCabal2nix "dataframe" ./. {
+            inherit granite;
+          };
         });
       in
       {
diff --git a/src/DataFrame/Typed.hs b/src/DataFrame/Typed.hs
index 03450fa..c744c1d 100644
--- a/src/DataFrame/Typed.hs
+++ b/src/DataFrame/Typed.hs
@@ -192,9 +192,6 @@ module DataFrame.Typed (
     -- * Constraints
     KnownSchema (..),
     AllKnownSymbol (..),
-
-    -- * Pipe operator
-    (|>),
 ) where
 
 import Prelude hiding (drop, filter, take)
diff --git a/src/DataFrame/Typed/Operations.hs b/src/DataFrame/Typed/Operations.hs
index b9cc642..c82dd3b 100644
--- a/src/DataFrame/Typed/Operations.hs
+++ b/src/DataFrame/Typed/Operations.hs
@@ -50,10 +50,8 @@ module DataFrame.Typed.Operations (
 
     -- * Vertical merge
     append,
-
 ) where
 
-import Data.Function ((&))
 import Data.Proxy (Proxy (..))
 import qualified Data.Text as T
 import qualified Data.Vector as V