From 0c9904f410e3e2a93b65ce36b221e8d481e11cca Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 24 Mar 2026 16:52:07 +0000
Subject: [PATCH 1/2] Initial plan


From fe763705fdaf23ebc741030170f9a7395f165d68 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 24 Mar 2026 16:57:25 +0000
Subject: [PATCH 2/2] Fix nsis-web appPackageUrl regression: only set
 APP_PACKAGE_URL_IS_INCOMPLETE when URL is auto-computed

Co-authored-by: mmaietta <5238867+mmaietta@users.noreply.github.com>
Agent-Logs-Url: https://github.com/electron-userland/electron-builder/sessions/9dde5509-d9a6-4528-a729-9efa7ee3f1f5
---
 .../src/targets/nsis/WebInstallerTarget.ts    |  2 +-
 test/src/windows/webInstallerTest.ts          | 23 ++++++++++++++++++-
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/packages/app-builder-lib/src/targets/nsis/WebInstallerTarget.ts b/packages/app-builder-lib/src/targets/nsis/WebInstallerTarget.ts
index cad495bdc36..ccc9b4aef75 100644
--- a/packages/app-builder-lib/src/targets/nsis/WebInstallerTarget.ts
+++ b/packages/app-builder-lib/src/targets/nsis/WebInstallerTarget.ts
@@ -30,9 +30,9 @@ export class WebInstallerTarget extends NsisTarget {
       }
 
       appPackageUrl = computeDownloadUrl(publishConfigs[0], null, packager)
+      defines.APP_PACKAGE_URL_IS_INCOMPLETE = null
     }
 
-    defines.APP_PACKAGE_URL_IS_INCOMPLETE = null
     defines.APP_PACKAGE_URL = appPackageUrl
   }
 
diff --git a/test/src/windows/webInstallerTest.ts b/test/src/windows/webInstallerTest.ts
index d3e56fa5bed..495ce923ddc 100644
--- a/test/src/windows/webInstallerTest.ts
+++ b/test/src/windows/webInstallerTest.ts
@@ -1,5 +1,5 @@
 import { Arch, Platform } from "electron-builder"
-import { app } from "../helpers/packTester"
+import { app, assertPack } from "../helpers/packTester"
 
 // tests are heavy, to distribute tests across CircleCI machines evenly, these tests were moved from oneClickInstallerTest
 
@@ -52,3 +52,24 @@ test("web installer, safe name on github", ({ expect }) =>
       },
     },
   }))
+
+test("web installer, appPackageUrl is complete URL (no arch paths appended)", ({ expect }) =>
+  assertPack(
+    expect,
+    "test-app-one",
+    {
+      targets: Platform.WINDOWS.createTarget(["nsis-web"], Arch.x64),
+      config: {
+        publish: null,
+        nsisWeb: {
+          appPackageUrl: "https://example.com/download/latest",
+        },
+      },
+      effectiveOptionComputed: async it => {
+        const defines = it[0]
+        expect(defines.APP_PACKAGE_URL).toEqual("https://example.com/download/latest")
+        expect(defines.APP_PACKAGE_URL_IS_INCOMPLETE).toBeUndefined()
+        return true
+      },
+    }
+  ))