diff --git a/.gitignore b/.gitignore
index 58fd493..5dfc9c0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,6 @@ formulas/
 
 # we don't want to copy a real sfm.yaml file
 sfm.yaml
+
+# don't copy around python env files
+env/