flake: update to latest nixpkgs

flake.lock

@@ -2,11 +2,11 @@
   "nodes": {
     "flake-utils": {
       "locked": {
-        "lastModified": 1656928814,
-        "narHash": "sha256-RIFfgBuKz6Hp89yRr7+NR5tzIAbn52h8vT6vXkYjZoM=",
+        "lastModified": 1676283394,
+        "narHash": "sha256-XX2f9c3iySLCw54rJ/CZs+ZK6IQy7GXNY4nSOyu2QG4=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "7e2a3b3dfd9af950a856d66b0a7d01e3c18aa249",
+        "rev": "3db36a8b464d0c4532ba1c7dda728f4576d6d073",
         "type": "github"
       },
       "original": {
@@ -17,11 +17,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1657114324,
-        "narHash": "sha256-fWuaUNXrHcz/ciHRHlcSO92dvV3EVS0GJQUSBO5JIB4=",
+        "lastModified": 1678470307,
+        "narHash": "sha256-OEeMUr3ueLIXyW/OaFUX5jUdimyQwMg/7e+/Q0gC/QE=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "a5c867d9fe9e4380452628e8f171c26b69fa9d3d",
+        "rev": "0c4800d579af4ed98ecc47d464a5e7b0870c4b1f",
         "type": "github"
       },
       "original": {
@@ -31,32 +31,19 @@
         "type": "github"
       }
     },
-    "nixpkgs_2": {
-      "locked": {
-        "lastModified": 1657261001,
-        "narHash": "sha256-sUZeuRYfhG59uD6xafM07bc7bAIkpcGq84Vj4B+cyms=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "0be91cefefde5701f8fa957904618a13e3bb51d8",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
     "poetry2nix": {
       "inputs": {
         "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs_2"
+        "nixpkgs": [
+          "nixpkgs"
+        ]
       },
       "locked": {
-        "lastModified": 1657149754,
-        "narHash": "sha256-iSnZoqwNDDVoO175whSuvl4sS9lAb/2zZ3Sa4ywo970=",
+        "lastModified": 1678513806,
+        "narHash": "sha256-bEto1lp9bIQ+DlJsXQyRxN5l6B/oy3Skb7DueYRJJBo=",
         "owner": "nix-community",
         "repo": "poetry2nix",
-        "rev": "fc1930e011dea149db81863aac22fe701f36f1b5",
+        "rev": "bf239d53fafb53cf439a72b3a50e86dd6a3984a5",
         "type": "github"
       },
       "original": {