diff --git a/pkgs/development/python-modules/pygreat/default.nix b/pkgs/development/python-modules/pygreat/default.nix
index 7497a733322f..937ce4b14eaf 100644
--- a/pkgs/development/python-modules/pygreat/default.nix
+++ b/pkgs/development/python-modules/pygreat/default.nix
@@ -34,7 +34,7 @@ buildPythonPackage rec {
   ];
 
   pythonRemoveDeps = [
-    "backports.functools-lru-cache"
+    "backports.functools_lru_cache"
   ];
 
   dependencies = [