diff --git a/flake.lock b/flake.lock
index d939454..a5dd415 100644
--- a/flake.lock
+++ b/flake.lock
@@ -97,17 +97,17 @@
     },
     "nixpkgs-reference": {
       "locked": {
-        "lastModified": 1782872117,
-        "narHash": "sha256-1OTpVD4z4KsG+WPH8O2BshANoWyCaaUCYf3ZMhslsHI=",
+        "lastModified": 1784728514,
+        "narHash": "sha256-eiEpAr3VH/FJyjEcrvptinPP87H/URGmk9ZORo8SKSc=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "536c906eb9a9a2a38e7a454f4a4ff254b1e6f493",
+        "rev": "2554179c70a3b46c13cacebf8e7960a17b6b3a05",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "536c906eb9a9a2a38e7a454f4a4ff254b1e6f493",
+        "rev": "2554179c70a3b46c13cacebf8e7960a17b6b3a05",
         "type": "github"
       }
     },
diff --git a/flake.nix b/flake.nix
index fbabddf..0b04808 100644
--- a/flake.nix
+++ b/flake.nix
@@ -16,7 +16,7 @@
     # `tests/spec/REFERENCE.md` and re-recording any affected fixtures
     # in the same commit. `cargo xtask spec versions` reports drift
     # between this pin and the floating `nixpkgs` as advisory output.
-    nixpkgs-reference.url = "github:nixos/nixpkgs/536c906eb9a9a2a38e7a454f4a4ff254b1e6f493";
+    nixpkgs-reference.url = "github:nixos/nixpkgs/2554179c70a3b46c13cacebf8e7960a17b6b3a05";
 
     rust-overlay = {
       url = "github:oxalica/rust-overlay";