diff --git a/pkgs/by-name/ta/tacent/package.nix b/pkgs/by-name/ta/tacent/package.nix
index a55a4e950426..602e62e1f6fc 100644
--- a/pkgs/by-name/ta/tacent/package.nix
+++ b/pkgs/by-name/ta/tacent/package.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation (finalAttrs: {
   src = fetchFromGitHub {
     owner = "bluescan";
     repo = "tacent";
-    tag = finalAttrs.version;
+    tag = "v${finalAttrs.version}";
     hash = "sha256-z8VuJS8OaVw5CeO/udvBEmcURKIy1oWVYUv6Ai8lTI8=";
   };