diff --git a/flake.nix b/flake.nix
index ab830f19..77bf6670 100644
--- a/flake.nix
+++ b/flake.nix
@@ -88,6 +88,7 @@
                 TextDiff
                 TextTable
                 XMLSimple
+                YAML
                 final.nix
                 final.nix.perl-bindings
                 git