Clean up dev workflow a bit

nix/package.nix

@@ -0,0 +1,44 @@
+{
+  self,
+  nix-filter,
+  pkgs,
+}: let
+  node_modules_attrs = {
+    # Dependencies that should be available in the node build
+    buildInputs = with pkgs; [
+      pkg-config
+      python3
+      vips
+      glib
+    ];
+  };
+
+  # Dependencies that should be available outside of the node build
+  buildInputs = with pkgs; [
+    util-linux
+  ];
+in {
+  package = pkgs.npmlock2nix.build {
+    inherit buildInputs node_modules_attrs;
+
+    src = pkgs.lib.cleanSource self;
+
+    buildCommands = ["npm run build-dist"];
+
+    installPhase = ''
+      cp -r dist $out/
+    '';
+  };
+
+  shell = pkgs.npmlock2nix.shell {
+    inherit buildInputs node_modules_attrs;
+
+    src = nix-filter.lib {
+      root = self;
+      include = [
+        "package.json"
+        "package-lock.json"
+      ];
+    };
+  };
+}