diff --git a/flake.lock b/flake.lock
index 0ea08ba43..76c2f5a8e 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,43 +1,43 @@
 {
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1651114127,
-        "narHash": "sha256-/lLC0wkMZkAdA5e1W76SnJzbhfOGDvync3VRHJMtAKk=",
+        "lastModified": 1655481042,
+        "narHash": "sha256-XHbcywq2vIQ5CeH1OK3TN793jkiNAAZsSctS1PFgseo=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "6766fb6503ae1ebebc2a9704c162b2aef351f921",
+        "rev": "103a4c0ae46afa9cf008c30744175315ca38e9f9",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
         "ref": "nixpkgs-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }
     },
     "root": {
       "inputs": {
         "nixpkgs": "nixpkgs",
         "utils": "utils"
       }
     },
     "utils": {
       "locked": {
         "lastModified": 1638122382,
         "narHash": "sha256-sQzZzAbvKEqN9s0bzWuYmRaA03v40gaJ4+iL1LXjaeI=",
         "owner": "numtide",
         "repo": "flake-utils",
         "rev": "74f7e4319258e287b0f9cb95426c9853b282730b",
         "type": "github"
       },
       "original": {
         "owner": "numtide",
         "repo": "flake-utils",
         "type": "github"
       }
     }
   },
   "root": "root",
   "version": 7
 }
diff --git a/nix/overlay.nix b/nix/overlay.nix
index 376f79f69..688fc2bb7 100644
--- a/nix/overlay.nix
+++ b/nix/overlay.nix
@@ -1,23 +1,29 @@
 # An overlay allows for a package set to be extended with new or modified packages
 
 # `final` refers to the package set with all overlays applied.
 # This allows for added or modified packages to be referenced with
 # all relevant changes
 final:
 
 # `prev` refers to the previous package set before this current overlay is applied.
 # This is cheaper for nix to evaluate, thus should be prefered over final when possible.
 prev:
 
 {
   # add packages meant for just this repository
   amqp-cpp = prev.callPackage ./amqp-cpp.nix { };
 
   protobuf_3_15_cmake = prev.callPackage ./protobuf_3_15.nix { };
 
   devShell = final.callPackage ./dev-shell.nix { };
 
   mysql-down = prev.callPackage ./mysql-down-linux.nix { };
 
   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;
+  });
 }