diff --git a/nix/sources.json b/nix/sources.json
index 7bb4320..6d1fffd 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -5,10 +5,10 @@
         "homepage": "",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "78419edadf0fabbe5618643bd850b2f2198ed060",
-        "sha256": "10xp417avlhl3gp9h3a7pj12w5g88wmizlz9bjjr7k15is4ihdkn",
+        "rev": "4a729ce4b1fe5ec4fffc71c67c96aa5184ebb462",
+        "sha256": "130qhasfvyvvb3rbmjd118j4grz8dylxsfqqj61w3ap2f3420lsl",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/78419edadf0fabbe5618643bd850b2f2198ed060.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/4a729ce4b1fe5ec4fffc71c67c96aa5184ebb462.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "olderIdeaNixpkgs": {