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"
+      ];
+    };
+  };
+}

nix/update-lockfile

@@ -0,0 +1,17 @@
+#!/usr/bin/env -S nix run 'github:clhodapp/nix-runner/32a984cfa14e740a34d14fad16fc479dec72bf07'
+#!pure
+#!package nixpkgs#bash
+#!package nixpkgs#coreutils
+#!package nixpkgs#direnv
+#!package nixpkgs#git
+#!package nixpkgs#nodejs-14_x
+#!command bash
+# shellcheck shell=bash
+
+set -eu
+
+cd "$(git rev-parse --show-toplevel)"
+unlink node_modules
+npm install --package-lock-only
+rm -rf node_modules
+direnv reload