Update nixpkgs

flake.lock

@@ -38,13 +38,12 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1633669643,
-        "narHash": "sha256-b+Ftnh/NUPqCzq0EBMZZ/SM/ywulJTiuI52Xjk4JQ0A=",
-        "ref": "master",
-        "rev": "55d644a6026eb4db2a8c536ff0b4d09556e97da7",
-        "revCount": 321645,
-        "type": "git",
-        "url": "file:///home/jens/dev/nixpkgs"
+        "lastModified": 1635403963,
+        "narHash": "sha256-0actzfzBAXvvDJ/EvPSGbtCPXUwSObQrcq0RpsPWZgA=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "2deb07f3ac4eeb5de1c12c4ba2911a2eb1f6ed61",
+        "type": "github"
       },
       "original": {
         "owner": "nixos",