diff --git a/pkgs/by-name/li/libavc1394/package.nix b/pkgs/by-name/li/libavc1394/package.nix
index 7a58f151c927..a0b9419abb07 100644
--- a/pkgs/by-name/li/libavc1394/package.nix
+++ b/pkgs/by-name/li/libavc1394/package.nix
@@ -20,7 +20,9 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkg-config ];
   propagatedBuildInputs = [ libraw1394 ];
 
-  NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isMusl "-largp";
+  env = lib.optionalAttrs stdenv.hostPlatform.isMusl {
+    NIX_LDFLAGS = "-largp";
+  };
 
   meta = {
     description = "Programming interface for the 1394 Trade Association AV/C (Audio/Video Control) Digital Interface Command Set";