flake: sync nixpkgs, update description

flake.lock

@@ -87,43 +87,10 @@
         "type": "github"
       }
     },
-    "nixpkgs_2": {
-      "locked": {
-        "lastModified": 1643247693,
-        "narHash": "sha256-rmShxIuNjYBz4l83J0J++sug+MURUY1koPCzX4F8hfo=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "6c4b9f1a2fd761e2d384ef86cff0d208ca27fdca",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-21.11",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgs_3": {
-      "locked": {
-        "lastModified": 1642961095,
-        "narHash": "sha256-RLatktZmvwFBOyqdoIk4qdS4OGKB7aKIvvs4ZP2L8D8=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "604c44137d97b5111be1ca5c0d97f6e24fbc5c2c",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-21.11",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
     "root": {
       "inputs": {
         "artiq": "artiq",
         "mozilla-overlay": "mozilla-overlay_2",
-        "nixpkgs": "nixpkgs_2",
         "zynq-rs": "zynq-rs"
       }
     },
@@ -196,7 +163,10 @@
     "zynq-rs": {
       "inputs": {
         "mozilla-overlay": "mozilla-overlay_3",
-        "nixpkgs": "nixpkgs_3"
+        "nixpkgs": [
+          "artiq",
+          "nixpkgs"
+        ]
       },
       "locked": {
         "lastModified": 1643971355,

flake.nix

@@ -1,14 +1,14 @@
 {
-  description = "ARTIQ port for Zynq platform";
+  description = "ARTIQ port to the Zynq-7000 platform";
 
-  inputs.nixpkgs.url = github:NixOS/nixpkgs/nixos-21.11;
+  inputs.artiq.url = git+https://github.com/m-labs/artiq.git;
   inputs.mozilla-overlay = { url = github:mozilla/nixpkgs-mozilla; flake = false; };
   inputs.zynq-rs.url = git+https://git.m-labs.hk/m-labs/zynq-rs;
-  inputs.artiq.url = git+https://github.com/m-labs/artiq.git;
+  inputs.zynq-rs.inputs.nixpkgs.follows = "artiq/nixpkgs";
 
-  outputs = { self, nixpkgs, mozilla-overlay, zynq-rs, artiq }: 
+  outputs = { self, mozilla-overlay, zynq-rs, artiq }:
   let
-    pkgs = import nixpkgs { system = "x86_64-linux"; overlays = [ (import mozilla-overlay) ]; };
+    pkgs = import artiq.inputs.nixpkgs { system = "x86_64-linux"; overlays = [ (import mozilla-overlay) ]; };
     zynqpkgs = zynq-rs.packages.x86_64-linux;
     artiqpkgs = artiq.packages.x86_64-linux;