diff --git a/flake.nix b/flake.nix
index 286cab792..a50533a29 100644
--- a/flake.nix
+++ b/flake.nix
@@ -454,6 +454,8 @@
 
           shellHook =
             ''
+              PATH=$prefix/bin:$PATH
+              unset PYTHONPATH
               export MANPATH=$out/share/man:$MANPATH
             '';
         });