diff --git a/npins/sources.json b/npins/sources.json
index f0e9ef7..aa18f82 100644
--- a/npins/sources.json
+++ b/npins/sources.json
@@ -73,8 +73,8 @@
     "nixpkgs": {
       "type": "Channel",
       "name": "nixpkgs-unstable",
-      "url": "https://releases.nixos.org/nixpkgs/nixpkgs-25.05pre720687.5a48e3c2e435/nixexprs.tar.xz",
-      "hash": "06g8b0ga935dnziyzhxznwcx1vb2clc84hcxwrcqb26lgjgwsgbf"
+      "url": "https://releases.nixos.org/nixpkgs/nixpkgs-25.05pre721840.71a6392e367b/nixexprs.tar.xz",
+      "hash": "172arjrskqfp9cv4pjs8b9554zy71ff3i594099iw2xvfxzjyly2"
     },
     "rat": {
       "type": "GitRelease",