diff --git a/nixos/modules/services/misc/ethminer.nix b/nixos/modules/services/misc/ethminer.nix
index a6c52e394996..253476d1a23e 100644
--- a/nixos/modules/services/misc/ethminer.nix
+++ b/nixos/modules/services/misc/ethminer.nix
@@ -97,7 +97,7 @@ in
         Restart = "always";
       };
 
-      environment = {
+      environment = mkIf (cfg.toolkit == "cuda") {
         LD_LIBRARY_PATH = "${config.boot.kernelPackages.nvidia_x11}/lib";
       };