diff --git a/pkgs/data/themes/kwin-decorations/kde-rounded-corners/default.nix b/pkgs/data/themes/kwin-decorations/kde-rounded-corners/default.nix
index 06b0e32d1b7..b77c136e406 100644
--- a/pkgs/data/themes/kwin-decorations/kde-rounded-corners/default.nix
+++ b/pkgs/data/themes/kwin-decorations/kde-rounded-corners/default.nix
@@ -12,13 +12,13 @@
 
 stdenv.mkDerivation rec {
   pname = "kde-rounded-corners";
-  version = "unstable-2021-11-06";
+  version = "0.1.1";
 
   src = fetchFromGitHub {
     owner = "matinlotfali";
     repo = "KDE-Rounded-Corners";
-    rev = "8ad8f5f5eff9d1625abc57cb24dc484d51f0e1bd";
-    sha256 = "0xbskf7jd03d2invfz1nnfc82klzvc784snw539n4kn6c6rc381p";
+    rev = "v${version}";
+    hash = "sha256-cXpJabeOHnat7OljtRzduUdOaA6Z3z6vV3aBKwiIrR0=";
   };
 
   postConfigure = ''