Update nixpkgs

nix/sources.json

@@ -17,10 +17,10 @@
         "homepage": "",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "9e86f5f7a19db6da2445f07bafa6694b556f9c6d",
-        "sha256": "0i2j7bf6jq3s13n12xahramami0n6zn1mksqgi01k7flpgyymcck",
+        "rev": "46251a79f752ae1d46ef733e8e9760b6d3429da4",
+        "sha256": "1xsp0xyrf8arjkf4wi09n96kbg0r8igsmzx8bhc1nj4nr078p0pg",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/9e86f5f7a19db6da2445f07bafa6694b556f9c6d.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/46251a79f752ae1d46ef733e8e9760b6d3429da4.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }