diff --git a/.envrc b/.envrc
index 3550a30..2951a88 100644
--- a/.envrc
+++ b/.envrc
@@ -1 +1,2 @@
 use flake
+layout python
diff --git a/flake.nix b/flake.nix
index b9d57fe..173725d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -39,6 +39,7 @@
             
                 datasette
                 python39
+                python39Packages.poetry
               ];
             
               LD_LIBRARY_PATH = "${lib.makeLibraryPath buildInputs}";