diff --git a/pkgs/development/libraries/llhttp/default.nix b/pkgs/development/libraries/llhttp/default.nix
index 8aac286c80ac..39b1e0bf260e 100644
--- a/pkgs/development/libraries/llhttp/default.nix
+++ b/pkgs/development/libraries/llhttp/default.nix
@@ -11,6 +11,8 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-kW6u9ETZJcJBh150chfE3SEwFpT7evZ0cqz8caM7fbQ=";
   };
 
+  outputs = [ "out" "dev" ];
+
   nativeBuildInputs = [
     cmake
   ];