master fix url of nixpkgs

Author: yaitskov

nix/sources.json

@@ -6,7 +6,7 @@
         "rev": "da5af46a09eeb2b1c8f4193d626727d5b7460601",
         "sha256": "sha256:1hmj9mg81gy8c7v8j563793sckawyxnca60zlif7qpsri597hlhh",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/e7a98efedcc1d0a2a8455580c562b20718c36444.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/da5af46a09eeb2b1c8f4193d626727d5b7460601.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "trace-embrace": {