diff --git a/nix/sources.json b/nix/sources.json
index 7f90692..f61d957 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -86,10 +86,10 @@
         "homepage": "https://github.com/NixOS/nixpkgs",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "c3d4ac725177c030b1e289015989da2ad9d56af0",
-        "sha256": "1n3dm76ip39zgw75jjn8ak9yp25m02ya1mzzg3764yfqq4jz18mj",
+        "rev": "6e99f2a27d600612004fbd2c3282d614bfee6421",
+        "sha256": "1qwbrn2cb1x9clkhqmdnx5r8v11168p3nx14h3r9wcml0bgblpvr",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/c3d4ac725177c030b1e289015989da2ad9d56af0.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/6e99f2a27d600612004fbd2c3282d614bfee6421.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nixpkgsUnstable": {