diff --git a/pkgs/os-specific/linux/ffado/default.nix b/pkgs/os-specific/linux/ffado/default.nix
index c91c014045b2..9a9a8b6dd7d3 100644
--- a/pkgs/os-specific/linux/ffado/default.nix
+++ b/pkgs/os-specific/linux/ffado/default.nix
@@ -110,7 +110,9 @@ stdenv.mkDerivation rec {
     argp-standalone
   ];
 
-  NIX_LDFLAGS = lib.optionalString (!stdenv.hostPlatform.isGnu) "-largp";
+  env = lib.optionalAttrs (!stdenv.hostPlatform.isGnu) {
+    NIX_LDFLAGS = "-largp";
+  };
 
   enableParallelBuilding = true;
   dontWrapQtApps = true;