diff --git a/pkgs/by-name/ou/outguess/package.nix b/pkgs/by-name/ou/outguess/package.nix
index f67980f1fc57..5ead0d00fc4a 100644
--- a/pkgs/by-name/ou/outguess/package.nix
+++ b/pkgs/by-name/ou/outguess/package.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation (finalAttrs: {
   src = fetchFromGitHub {
     owner = "resurrecting-open-source-projects";
     repo = "outguess";
-    rev = finalAttrs.version;
+    rev = "refs/tags/${finalAttrs.version}";
     hash = "sha256-yv01jquPTnVk9fd1tqAt1Lxis+ZHZqdG3NiTFxfoXAE=";
   };