diff --git a/nix/overlay.nix b/nix/overlay.nix
--- a/nix/overlay.nix
+++ b/nix/overlay.nix
@@ -21,12 +21,6 @@
 
   mysql-up = prev.callPackage ./mysql-up-linux.nix { };
 
-  arcanist = prev.arcanist.override(_: {
-    # php8.1 will cause warnings to throw as exceptions
-    # around calling strlen() with null
-    php = prev.php80;
-  });
-
   olm = prev.olm.overrideAttrs(oldAttrs: {
     # *.hh files aren't meant to be used externally
     # so we patch installation to add it