diff --git a/pkgs/development/python-modules/py3exiv2/default.nix b/pkgs/development/python-modules/py3exiv2/default.nix
index c9949ac9106..7995cf8bae2 100644
--- a/pkgs/development/python-modules/py3exiv2/default.nix
+++ b/pkgs/development/python-modules/py3exiv2/default.nix
@@ -26,7 +26,7 @@ buildPythonPackage rec {
   ];
 
   # work around python distutils compiling C++ with $CC (see issue #26709)
-  NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin [ 
+  NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin [
     "-I${lib.getDev libcxx}/include/c++/v1"
   ];