diff --git a/pkgs/by-name/li/libstemmer/package.nix b/pkgs/by-name/li/libstemmer/package.nix
index a5373db45339..2cbf6c6cf910 100644
--- a/pkgs/by-name/li/libstemmer/package.nix
+++ b/pkgs/by-name/li/libstemmer/package.nix
@@ -13,8 +13,8 @@ stdenv.mkDerivation (finalAttrs: {
   src = fetchFromGitHub {
     owner = "snowballstem";
     repo = "snowball";
-    rev = "v${finalAttrs.version}";
-    sha256 = "sha256-qXrypwv/I+5npvGHGsHveijoui0ZnoGYhskCfLkewVE=";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-qXrypwv/I+5npvGHGsHveijoui0ZnoGYhskCfLkewVE=";
   };
 
   nativeBuildInputs = [ perl ];
@@ -39,6 +39,8 @@ stdenv.mkDerivation (finalAttrs: {
     runHook postInstall
   '';
 
+  __structuredAttrs = true;
+
   meta = {
     description = "Snowball Stemming Algorithms";
     homepage = "https://snowballstem.org/";