diff --git a/pkgs/development/python-modules/python-uinput/default.nix b/pkgs/development/python-modules/python-uinput/default.nix
index 25af52c42652..d2598e60f84b 100644
--- a/pkgs/development/python-modules/python-uinput/default.nix
+++ b/pkgs/development/python-modules/python-uinput/default.nix
@@ -17,7 +17,7 @@ buildPythonPackage rec {
 
   buildInputs = [ udev ];
 
-  NIX_CFLAGS_LINK = "-ludev";
+  env.NIX_CFLAGS_LINK = "-ludev";
 
   doCheck = false; # no tests