diff --git a/pkgs/by-name/mu/musl-obstack/package.nix b/pkgs/by-name/mu/musl-obstack/package.nix
index 8915e8b452b5..cbd56e5bb559 100644
--- a/pkgs/by-name/mu/musl-obstack/package.nix
+++ b/pkgs/by-name/mu/musl-obstack/package.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation (finalAttrs: {
   src = fetchFromGitHub {
     owner = "void-linux";
     repo = "musl-obstack";
-    rev = "v${finalAttrs.version}";
+    tag = "v${finalAttrs.version}";
     sha256 = "sha256-oydS7FubUniMHAUWfg84OH9+CZ0JCrTXy7jzwOyJzC8=";
   };
 
@@ -30,6 +30,8 @@ stdenv.mkDerivation (finalAttrs: {
 
   enableParallelBuilding = true;
 
+  __structuredAttrs = true;
+
   meta = {
     homepage = "https://github.com/void-linux/musl-obstack";
     description = "Extraction of the obstack functions and macros from GNU libiberty for use with musl-libc";