diff --git a/scripts/check-fmt-git-files.bash b/scripts/check-fmt-git-files.bash
index 9b04de4d..72a8f9d1 100755
--- a/scripts/check-fmt-git-files.bash
+++ b/scripts/check-fmt-git-files.bash
@@ -1,4 +1,4 @@
-#!/usr/bin/env -S nix shell nixpkgs#bash nixpkgs#git --command bash
+#!/usr/bin/env -S nix --extra-experimental-features "flakes nix-command" shell nixpkgs#bash nixpkgs#git --command bash
 # vim: ft=sh
 
 set -euo pipefail
diff --git a/scripts/fmt.bash b/scripts/fmt.bash
index df0bcbb2..6ae145e3 100755
--- a/scripts/fmt.bash
+++ b/scripts/fmt.bash
@@ -1,4 +1,4 @@
-#!/usr/bin/env -S nix shell nixpkgs#bash nixpkgs#stylua nixpkgs#gnugrep nixpkgs#nixfmt nixpkgs#nodePackages.prettier nixpkgs#shfmt --command bash
+#!/usr/bin/env -S nix --extra-experimental-features "flakes nix-command" shell nixpkgs#bash nixpkgs#stylua nixpkgs#gnugrep nixpkgs#nixfmt nixpkgs#nodePackages.prettier nixpkgs#shfmt --command bash
 # vim: ft=sh
 
 set -euo pipefail