diff --git a/pkgs/development/python-modules/autograd-gamma/default.nix b/pkgs/development/python-modules/autograd-gamma/default.nix
index 1ac63e9d8564..e6c4398ef2d3 100644
--- a/pkgs/development/python-modules/autograd-gamma/default.nix
+++ b/pkgs/development/python-modules/autograd-gamma/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage (finalAttrs: {
   src = fetchFromGitHub {
     owner = "CamDavidsonPilon";
     repo = "autograd-gamma";
-    rev = "v${finalAttrs.version}";
+    tag = "v${finalAttrs.version}";
     sha256 = "0v03gly5k3a1hzb54zpw6409m3riak49qd27hkq2f66ai42ivqz2";
   };