diff --git a/pkgs/development/python-modules/agate/default.nix b/pkgs/development/python-modules/agate/default.nix
index 49d74b0cae4b..289682f531dd 100644
--- a/pkgs/development/python-modules/agate/default.nix
+++ b/pkgs/development/python-modules/agate/default.nix
@@ -25,7 +25,7 @@ buildPythonPackage (finalAttrs: {
   src = fetchFromGitHub {
     owner = "wireservice";
     repo = "agate";
-    tag = version;
+    tag = finalAttrs.version;
     hash = "sha256-tjPI2LLiWbjAZW4uh2EPUa4m19w5XgODiHP2R/S/8mU=";
   };