diff --git a/npins/sources.json b/npins/sources.json
index e631cda..5c1f1e7 100644
--- a/npins/sources.json
+++ b/npins/sources.json
@@ -107,8 +107,8 @@
     "nixpkgs": {
       "type": "Channel",
       "name": "nixpkgs-unstable",
-      "url": "https://releases.nixos.org/nixpkgs/nixpkgs-25.11pre901289.ee09932cedce/nixexprs.tar.xz",
-      "hash": "0fhp30vs6cavr1547j0kzr46p7lsm1ylxj2qqp87a3jz6n542mhb"
+      "url": "https://releases.nixos.org/nixpkgs/nixpkgs-26.05pre902642.bb813de6d224/nixexprs.tar.xz",
+      "hash": "0mq4bb4wrqvi7iz8r4aaxi6xa50rz29vifnill4avrfky9immv4q"
     },
     "rat": {
       "type": "GitRelease",