diff --git a/npins/sources.json b/npins/sources.json
index a47c308..7187623 100644
--- a/npins/sources.json
+++ b/npins/sources.json
@@ -304,8 +304,8 @@
     "nixos-unstable": {
       "type": "Channel",
       "name": "nixos-unstable",
-      "url": "https://releases.nixos.org/nixos/unstable/nixos-25.05beta764837.e3e32b642a31/nixexprs.tar.xz",
-      "hash": "1wc6jv1b8wrshckiw1avb11cj40riiydaqqpipcbz3w4km7cis2d"
+      "url": "https://releases.nixos.org/nixos/unstable/nixos-25.05pre779115.42a1c966be22/nixexprs.tar.xz",
+      "hash": "1nhssqmgyvmbznf8f3xd63npf3z190nlxb4z1hayplww8clk5icg"
     },
     "signal-irc-bridge": {
       "type": "Git",