diff --git a/nixos/modules/hardware/opengl.nix b/nixos/modules/hardware/opengl.nix
index 7778c3f5409..ab5c309bd42 100644
--- a/nixos/modules/hardware/opengl.nix
+++ b/nixos/modules/hardware/opengl.nix
@@ -101,7 +101,7 @@ in
         ''}
       '';
 
-    environment.systemVariables.LD_LIBRARY_PATH =
+    environment.sessionVariables.LD_LIBRARY_PATH =
       [ "/run/opengl-driver/lib" "/run/opengl-driver-32/lib" ];
 
     # FIXME: move this into card-specific modules.