[automation] update niv dependencies

Author: sambacha

nix/sources.json

@@ -17,10 +17,10 @@
         "homepage": "https://github.com/NixOS/nixpkgs",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "462c6fe4b115804ea4d5bee7103c0f46ff9f9cfb",
-        "sha256": "0a4bdaxjrds6kyw9s3r2vbc96f7glgy5n03jk4zr5z8h3j4v2s81",
+        "rev": "6d1a044fc9ff3cc96fca5fa3ba9c158522bbf2a5",
+        "sha256": "07a3nyrj3pwl017ig0rbn5rbmbf14gl3vqggvkyrdby01726p5fg",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/462c6fe4b115804ea4d5bee7103c0f46ff9f9cfb.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/6d1a044fc9ff3cc96fca5fa3ba9c158522bbf2a5.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "pre-commit-hooks.nix": {
@@ -29,10 +29,10 @@
         "homepage": "",
         "owner": "cachix",
         "repo": "pre-commit-hooks.nix",
-        "rev": "c7e3896e35ceea480a7484ec1709be7bdda8849d",
-        "sha256": "0xl9f6ydgk8gnn22f392p3zna0cishwj8id1vpy0p0s06wsbhfs5",
+        "rev": "f3fec488b5efed9104742811862e434e8f992dc9",
+        "sha256": "17h68agk7d4smaczv7a8p3izjm544z69y5vfwzp250ij24p02a10",
         "type": "tarball",
-        "url": "https://github.com/cachix/pre-commit-hooks.nix/archive/c7e3896e35ceea480a7484ec1709be7bdda8849d.tar.gz",
+        "url": "https://github.com/cachix/pre-commit-hooks.nix/archive/f3fec488b5efed9104742811862e434e8f992dc9.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }