diff --git a/nix/sources.json b/nix/sources.json
index ec973b7..ca633a0 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -54,10 +54,10 @@
         "homepage": "https://github.com/NixOS/nixpkgs",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "dc2870a606a7a5a6aeb387ddab78e02cbe41924b",
-        "sha256": "1z0ng2prylzdj25i3ms7l3fs960dkv9vwxv72a7ig9vidrx653ah",
+        "rev": "91b77fe6942fe999b1efbe906dc98024d1917c0d",
+        "sha256": "041l46ccllbf9b94jxahw64zsjxs1368y4m5a5q2h41w82jjmdk1",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/dc2870a606a7a5a6aeb387ddab78e02cbe41924b.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/91b77fe6942fe999b1efbe906dc98024d1917c0d.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }