diff --git a/.envrc b/.envrc
index a87a0775d7..95a54ad8d3 100644
--- a/.envrc
+++ b/.envrc
@@ -13,7 +13,7 @@ store_paths=$(echo "$nix_files" | xargs nix-store --add ./nix)
 layout_dir=$(direnv_layout_dir)
 env_dir=./.env
 
-export NIX_CONFIG='extra-experimental-features = nix-command flakes'
+export NIX_CONFIG='extra-experimental-features = nix-command'
 
 [[ -d "$layout_dir" ]] || mkdir -p "$layout_dir"
 
diff --git a/hack/bin/bombon.hs b/hack/bin/bombon.hs
index 2b10440079..8f90127af9 100755
--- a/hack/bin/bombon.hs
+++ b/hack/bin/bombon.hs
@@ -1,4 +1,4 @@
-#!/usr/bin/env -S nix -Lv run github:wireapp/ghc-flakr/ecb1f45f1549e06c92d71164e305ce501eb0e36e
+#!/usr/bin/env -S nix --extra-experimental-features flakes -Lv run github:wireapp/ghc-flakr/ecb1f45f1549e06c92d71164e305ce501eb0e36e
 {-# LANGUAGE BlockArguments #-}
 {-# LANGUAGE ImportQualifiedPost #-}
 {-# LANGUAGE OverloadedStrings #-}