try adding pnpm2nix-nzbr

flake.nix

@@ -17,6 +17,8 @@
   inputs.rust-overlay.inputs.nixpkgs.follows = "nixpkgs";
   inputs.dream2nix.url = "github:nix-community/dream2nix";
   inputs.dream2nix.inputs.nixpkgs.follows = "nixpkgs";
+  inputs.pnpm2nix-nzbr.url = "github:nzbr/pnpm2nix-nzbr";
+  inputs.pnpm2nix-nzbr.inputs.nixpkgs.follows = "nixpkgs"
 
   outputs = {
     self,
@@ -26,6 +28,7 @@
     sops-nix,
     rust-overlay,
     dream2nix,
+    pnpm2nix-nzbr,
     ...
   }: let
     inherit
@@ -72,7 +75,7 @@
 
       pkgsByName = import ./pkgs/by-name {
         inherit (pkgs) lib;
-        inherit callPackage dream2nix pkgs;
+        inherit callPackage dream2nix pnpm2nix-nzbr pkgs;
       };
 
       explicitPkgs = import ./pkgs {

pkgs/by-name/atomic-browser/package.nix

@@ -0,0 +1,27 @@
+{ pkgs, fetchFromGitHub, mkPnpmPackage, fetchYarnDeps, fetchpatch, ... }:
+let
+  source = fetchFromGitHub {
+    owner = "atomicdata-dev";
+    repo = "atomic-server";
+  };
+in
+mkPnpmPackage rec {
+  name = "atomic-web";
+  version = "v0.34.5";
+  src = "${source}/browser";
+
+  patches = [
+    ./workspaces.patch
+  ];
+
+  installPhase = "";
+  distPhase = "";
+
+   packageJSON = "${source}/browser/package.json";
+   # Upstream does not contain a yarn.lock
+   yarnLock = ./yarn.lock;
+   offlineCache = fetchYarnDeps {
+     yarnLock = ./yarn.lock;
+     hash = "sha256-GK5Ehk82VQ5ajuBTQlPwTB0aaxhjAoD2Uis8wiam7Z0=";
+   };
+}