diff --git a/build/fbcode_builder/manifests/python b/build/fbcode_builder/manifests/python
index 55525c3e9..2dccc2cdf 100644
--- a/build/fbcode_builder/manifests/python
+++ b/build/fbcode_builder/manifests/python
@@ -5,7 +5,8 @@ name = python
 python3
 python3-devel
 
-[debs]
+# eden_scm needs dataclasses which arrive in 3.7, and the bionic python is 3.6
+[debs.not(all(distro=ubuntu,distro_vers="18.04"))]
 python3-all-dev
 
 [download]