diff --git a/nix/sources.json b/nix/sources.json
index 2035bde..9139f8a 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -54,10 +54,10 @@
         "homepage": "https://github.com/NixOS/nixpkgs",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "60b18a066e8ce5dd21ebff5324345d3586a67ad9",
-        "sha256": "1cr7r16vb4nxifykhak8awspdpr775kafrl7p6asgwicsng7giya",
+        "rev": "66f4dc4fd1b47e9e06d0f1bd78faffa51f0cc59c",
+        "sha256": "19pfg4hy4gcazcpyrkg164hsmiyg5zm0a0d8sx6p06sg9h0r0kxd",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/60b18a066e8ce5dd21ebff5324345d3586a67ad9.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/66f4dc4fd1b47e9e06d0f1bd78faffa51f0cc59c.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }