diff --git a/nix/sources.json b/nix/sources.json
index cb3ae02..1a3435c 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -17,10 +17,10 @@
         "homepage": null,
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "e7f38be3775bab9659575f192ece011c033655f0",
-        "sha256": "1kbkhjjlb4v90f3jyc8pm0n9v8lv46b0vaynf0ky44gap7sri0dx",
+        "rev": "e56990880811a451abd32515698c712788be5720",
+        "sha256": "0pxyn7lh72ghwwp9yfxzd3ac03j05jpjiw87ckfdi29zc6ahhqr2",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/e7f38be3775bab9659575f192ece011c033655f0.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/e56990880811a451abd32515698c712788be5720.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }