feat(dx/desktop): improve rebuilding experience on NixOS

scripts/utils.mts

@@ -1,3 +1,4 @@
+import { execSync } from "child_process";
 import { readFileSync } from "fs";
 import { platform } from "os";
 
@@ -7,7 +8,7 @@ export function isNixOS() {
     return osReleaseFile.includes("ID=nixos");
 }
 
-export function resetPath() {
+function resetPath() {
     // On Unix-like systems, PATH is usually inherited from login shell
     // but npm prepends node_modules/.bin. Let's remove it:
     const origPath = process.env.PATH || "";
@@ -18,3 +19,12 @@ export function resetPath() {
         .filter(p => !p.includes("node_modules/.bin"))
         .join(":");
 }
+
+export function getElectronPath() {
+    if (isNixOS()) {
+        resetPath();            
+        return execSync("nix eval --raw nixpkgs#electron_37").toString("utf-8") + "/bin/electron";
+    } else {
+        return "electron";
+    }
+}