diff --git a/flake/nixpkgs.nix b/flake/nixpkgs.nix
index fb127e75..8ee10908 100644
--- a/flake/nixpkgs.nix
+++ b/flake/nixpkgs.nix
@@ -63,6 +63,11 @@ import inputs.nixpkgs {
 
         gerschtli = prev.lib.composeManyExtensions gerschtliOverlays final prev;
 
+        # FIXME: stable nix_2_18 fails on aarch
+        nixVersions = super.nixVersions // {
+          inherit (unstable.nixVersions) nix_2_18;
+        };
+
         # the only alias that I need, this allows me to set allowAliases=false
         inherit system;
       }