diff --git a/pkgs/by-name/em/empty-epsilon/package.nix b/pkgs/by-name/em/empty-epsilon/package.nix
index c61e1bce9702..d4009323fb73 100644
--- a/pkgs/by-name/em/empty-epsilon/package.nix
+++ b/pkgs/by-name/em/empty-epsilon/package.nix
@@ -15,16 +15,16 @@
 
 let
   version = {
-    seriousproton = "2024.08.09";
-    emptyepsilon = "2024.08.09";
-    basis-universal = "v1_15_update2";
+    seriousproton = "2024.12.08";
+    emptyepsilon = "2024.12.08";
+    basis-universal = "1.15_final";
   };
 
   basis-universal = fetchFromGitHub {
     owner = "BinomialLLC";
     repo = "basis_universal";
-    rev = version.basis-universal;
-    hash = "sha256-2snzq/SnhWHIgSbUUgh24B6tka7EfkGO+nwKEObRkU4=";
+    tag = version.basis-universal;
+    hash = "sha256-pKvfVvdbPIdzdSOklicThS7xwt4i3/21bE6wg9f8kHY=";
   };
 
   serious-proton = stdenv.mkDerivation {
@@ -34,8 +34,8 @@ let
     src = fetchFromGitHub {
       owner = "daid";
       repo = "SeriousProton";
-      rev = "EE-${version.seriousproton}";
-      hash = "sha256-B7BUe5rtN/eABJwkuSyn+h1lIHuV/tZUNcGXTyaWIr4=";
+      tag = "EE-${version.seriousproton}";
+      hash = "sha256-k1YCB7EJIL+kdlHEU4cJjmLZZAZyxIPU0XlSn2t4C90=";
     };
 
     nativeBuildInputs = [ cmake ];
@@ -69,8 +69,8 @@ stdenv.mkDerivation {
   src = fetchFromGitHub {
     owner = "daid";
     repo = "EmptyEpsilon";
-    rev = "EE-${version.emptyepsilon}";
-    hash = "sha256-DxaasUyJa8n0ha8RqAfEnqCVELs5Or0zvIOgcK75TnU=";
+    tag = "EE-${version.emptyepsilon}";
+    hash = "sha256-JsHFwbt4VGsgaZz9uxEmwzZGfkYTNsIZTKkpvCCmI48=";
   };
 
   nativeBuildInputs = [ cmake ];