update nixpkgs-unstable

Author: cdmistman

nix/sources.json

@@ -112,10 +112,10 @@
         "homepage": "",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "cbd8ec4de4469333c82ff40d057350c30e9f7d36",
-        "sha256": "1bcgis62aj9slin2cm2h7ywqq4qswh4kzdlx0zgdwz80g4z10f8f",
+        "rev": "573c650e8a14b2faa0041645ab18aed7e60f0c9a",
+        "sha256": "0qg99zj0gb0pc6sjlkmwhk1c1xz14qxmk6gamgfmcxpsfdp5vn72",
         "type": "tarball",
-        "url": "https://github.com/nixos/nixpkgs/archive/cbd8ec4de4469333c82ff40d057350c30e9f7d36.tar.gz",
+        "url": "https://github.com/nixos/nixpkgs/archive/573c650e8a14b2faa0041645ab18aed7e60f0c9a.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "prybar": {