diff --git a/.envrc b/.envrc
index 1e385a24..642e425d 100644
--- a/.envrc
+++ b/.envrc
@@ -11,3 +11,7 @@ use flake
 
 # Activate the project venv
 . .venv/bin/activate
+
+# Tell UV to use the venv python, without this it will use system python on
+# NixOS. Which means `uv pip list` will not work.
+export UV_PYTHON=.venv/bin/python