diff --git a/krebs/nixpkgs-unstable.json b/krebs/nixpkgs-unstable.json
index 967f0b426..17b0619ed 100644
--- a/krebs/nixpkgs-unstable.json
+++ b/krebs/nixpkgs-unstable.json
@@ -1,9 +1,9 @@
 {
   "url": "https://github.com/NixOS/nixpkgs",
-  "rev": "dd14e5d78e90a2ccd6007e569820de9b4861a6c2",
-  "date": "2021-07-24T08:14:16-04:00",
-  "path": "/nix/store/0z5nrrjzmjcicjhhdrqb9vgm56zxysk3-nixpkgs",
-  "sha256": "1zmhwx1qqgl1wrrb9mjkck508887rldrnragvximhd7jrh1ya3fb",
+  "rev": "6ef4f522d63f22b40004319778761040d3197390",
+  "date": "2021-08-08T17:34:03-06:00",
+  "path": "/nix/store/81sh4z8lwwz5z5dw3wpp715x23jis8db-nixpkgs",
+  "sha256": "0cz02l0mdjr5vnv0kfkiabdjc3mv26lva414ksaf3xpan3sp08s1",
   "fetchSubmodules": false,
   "deepClone": false,
   "leaveDotGit": false