diff --git a/npins/sources.json b/npins/sources.json
index 1151d88..c3660ef 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-25.05pre733616.bf689c40d035/nixexprs.tar.xz",
-      "hash": "08prv5ya8ra9wlxf3pr25rc7gc12lgzqdxz5dng1fsskdfmpw7sf"
+      "url": "https://releases.nixos.org/nixpkgs/nixpkgs-25.05pre734493.8c9fd3e56472/nixexprs.tar.xz",
+      "hash": "1dl2f63ivpl074k0mlz39rl5vqpxz432rypasiya6v0ixl2cjkh8"
     },
     "rat": {
       "type": "GitRelease",