diff --git a/pkgs/by-name/ec/ecwolf/package.nix b/pkgs/by-name/ec/ecwolf/package.nix
index 68b8b503a0448..dee16bc3d3b06 100644
--- a/pkgs/by-name/ec/ecwolf/package.nix
+++ b/pkgs/by-name/ec/ecwolf/package.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation (finalAttrs: {
   src = fetchFromBitbucket {
     owner = "ecwolf";
     repo = "ecwolf";
-    rev = finalAttrs.version;
+    rev = "refs/tags/${finalAttrs.version}";
     sha256 = "V2pSP8i20zB50WtUMujzij+ISSupdQQ/oCYYrOaTU1g=";
   };