diff --git a/pkgs/development/python-modules/fastremap/default.nix b/pkgs/development/python-modules/fastremap/default.nix
index 2337bc54fc5c..be5c58e18792 100644
--- a/pkgs/development/python-modules/fastremap/default.nix
+++ b/pkgs/development/python-modules/fastremap/default.nix
@@ -38,6 +38,8 @@ buildPythonPackage rec {
     pytestCheckHook
   ];
 
+  preCheck = "rm -r fastremap/";
+
   pythonImportsCheck = [
     "fastremap"
   ];