diff --git a/nix/sources.json b/nix/sources.json
index dce3100..b45cee7 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -74,10 +74,10 @@
         "homepage": "https://github.com/NixOS/nixpkgs",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "664b342ce0bba16adbf64f039341ed98390efda8",
-        "sha256": "0sidxlam0vmbp8va1yvp4fghf5g23l31fzcv51yxs6p2si5qhs34",
+        "rev": "cf63ade6f74bbc9d2a017290f1b2e33e8fbfa70a",
+        "sha256": "1aw4avc6mp3v1gwjlax6yn8984c92y56s4h7qrygxagpchkwq06j",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/664b342ce0bba16adbf64f039341ed98390efda8.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/cf63ade6f74bbc9d2a017290f1b2e33e8fbfa70a.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nixpkgsUnstable": {