diff --git a/pkgs/development/python-modules/duckdb/default.nix b/pkgs/development/python-modules/duckdb/default.nix
index b6b59ab67f26..0e95164db601 100644
--- a/pkgs/development/python-modules/duckdb/default.nix
+++ b/pkgs/development/python-modules/duckdb/default.nix
@@ -25,19 +25,21 @@ buildPythonPackage rec {
     ;
   pyproject = true;
 
-  postPatch = (duckdb.postPatch or "") + ''
-    # we can't use sourceRoot otherwise patches don't apply, because the patches apply to the C++ library
-    cd tools/pythonpkg
+  postPatch =
+    (duckdb.postPatch or "")
+    + ''
+      # we can't use sourceRoot otherwise patches don't apply, because the patches apply to the C++ library
+      cd tools/pythonpkg
 
-    # 1. let nix control build cores
-    # 2. default to extension autoload & autoinstall disabled
-    substituteInPlace setup.py \
-      --replace-fail "ParallelCompile()" 'ParallelCompile("NIX_BUILD_CORES")' \
-      --replace-fail "define_macros.extend([('DUCKDB_EXTENSION_AUTOLOAD_DEFAULT', '1'), ('DUCKDB_EXTENSION_AUTOINSTALL_DEFAULT', '1')])" "pass"
+      # 1. let nix control build cores
+      # 2. default to extension autoload & autoinstall disabled
+      substituteInPlace setup.py \
+        --replace-fail "ParallelCompile()" 'ParallelCompile("NIX_BUILD_CORES")' \
+        --replace-fail "define_macros.extend([('DUCKDB_EXTENSION_AUTOLOAD_DEFAULT', '1'), ('DUCKDB_EXTENSION_AUTOINSTALL_DEFAULT', '1')])" "pass"
 
-    substituteInPlace pyproject.toml \
-      --replace-fail 'setuptools_scm>=6.4,<8.0' 'setuptools_scm'
-  '';
+      substituteInPlace pyproject.toml \
+        --replace-fail 'setuptools_scm>=6.4,<8.0' 'setuptools_scm'
+    '';
 
   env = {
     DUCKDB_BUILD_UNITY = 1;