build: use a Nix flake and flake-parts

.yarnrc

@@ -1 +0,0 @@
---modules-folder /node_modules

flake.lock

@@ -1,12 +1,48 @@
 {
   "nodes": {
+    "devshell": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1678957337,
+        "narHash": "sha256-Gw4nVbuKRdTwPngeOZQOzH/IFowmz4LryMPDiJN/ah4=",
+        "owner": "numtide",
+        "repo": "devshell",
+        "rev": "3e0e60ab37cd0bf7ab59888f5c32499d851edb47",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "devshell",
+        "type": "github"
+      }
+    },
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
+      "locked": {
+        "lastModified": 1680392223,
+        "narHash": "sha256-n3g7QFr85lDODKt250rkZj2IFS3i4/8HBU2yKHO3tqw=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "dcc36e45d054d7bb554c9cdab69093debd91a0b5",
+        "type": "github"
+      },
+      "original": {
+        "id": "flake-parts",
+        "type": "indirect"
+      }
+    },
     "flake-utils": {
       "locked": {
-        "lastModified": 1678901627,
+        "lastModified": 1642700792,
-        "narHash": "sha256-U02riOqrKKzwjsxc/400XnElV+UtPUQWpANPlyazjH0=",
+        "narHash": "sha256-XqHrk7hFb+zBvRg6Ghl+AZDq03ov6OshJLiSWOoX5es=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "93a2b84fc4b70d9e089d029deacc3583435c2ed6",
+        "rev": "846b2ae0fc4cc943637d3d1def4454213e203cba",
         "type": "github"
       },
       "original": {
@@ -17,24 +53,59 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1679431620,
+        "lastModified": 1677383253,
-        "narHash": "sha256-n3K48VgwjlXmDUica6FMgBHMeftDgcSTtFe+lnIcwOY=",
+        "narHash": "sha256-UfpzWfSxkfXHnb4boXZNaKsAcUrZT9Hw+tao1oZxd08=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "e97bb3fb6b9c5fff48247c15d19493839447a0e2",
+        "rev": "9952d6bc395f5841262b006fbace8dd7e143b634",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "master",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib": {
+      "locked": {
+        "dir": "lib",
+        "lastModified": 1680213900,
+        "narHash": "sha256-cIDr5WZIj3EkKyCgj/6j3HBH4Jj1W296z7HTcWj1aMA=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "e3652e0735fbec227f342712f180f4f21f0594f2",
+        "type": "github"
+      },
+      "original": {
+        "dir": "lib",
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1680213900,
+        "narHash": "sha256-cIDr5WZIj3EkKyCgj/6j3HBH4Jj1W296z7HTcWj1aMA=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "e3652e0735fbec227f342712f180f4f21f0594f2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }
     },
     "root": {
       "inputs": {
-        "flake-utils": "flake-utils",
+        "devshell": "devshell",
-        "nixpkgs": "nixpkgs"
+        "flake-parts": "flake-parts",
+        "nixpkgs": "nixpkgs_2"
       }
     }
   },

flake.nix

@@ -1,21 +1,17 @@
 {
-  inputs = {
+  inputs.devshell.url = "github:numtide/devshell";
-    nixpkgs.url = "github:NixOS/nixpkgs/master";
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
-    flake-utils.url = "github:numtide/flake-utils";
-  };
 
-  outputs = { self, nixpkgs, flake-utils }:
+  outputs = inputs@{ flake-parts, ... }:
-    flake-utils.lib.eachDefaultSystem (system:
+    flake-parts.lib.mkFlake { inherit inputs; } {
-      let
+      imports = [ inputs.devshell.flakeModule ];
-        pkgs = nixpkgs.legacyPackages.${system};
+
-      in
+      systems = [ "x86_64-linux" ];
-      {
+
-        devShell = with pkgs; pkgs.mkShell {
+      perSystem = { config, self', inputs', pkgs, system, ... }: {
-          buildInputs = [
+        devshells.default = {
-            just
+          packages = with pkgs; [ just nodejs-19_x yarn ];
-            nodejs-19_x
+        };
-            yarn
+      };
-          ];
     };
-      });
 }