Aspire.Hosting.JavaScript - WithPnpm fails when using Scoop-installed pnpm

[pBouillon]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

When using the new AddJavaScriptApp and WithPnpm with Aspire.Hosting.JavaScript version 13.1.2, the resource fails to start with pnpm installed via the Scoop package manager on Windows 11.

My AppHost.cs contains the following, according to the release notes of v13:

builder
    .AddJavaScriptApp(name: "frontend", appDirectory: "./MyProject.Web")
    .WithPnpm();

Upon executing aspire run, the frontend resource starts along the frontend-installer, but the later fails:

The logs indicate an error starting the pnpm process:

Executing command 'resource-start'.
Successfully executed command 'resource-start'.
[sys] Starting process...: Cmd = C:\Users\pBouillon\scoop\shims\pnpm.exe, Args = ["install"]
[sys] Failed to start a process: Cmd = C:\Users\pBouillon\scoop\shims\pnpm.exe, Args = ["install"], Error = fork/exec C:\Users\pBouillon\scoop\shims\pnpm.exe: The directory name is invalid.
[sys] Failed to start Executable: Error = fork/exec C:\Users\pBouillon\scoop\shims\pnpm.exe: The directory name is invalid.

However, pnpm is indeed installed at this location, and works fine from the terminal:

Expected Behavior

The resource should successfully execute the pnpm install command via the shim or correctly resolve the path to the actual binary.

Steps To Reproduce

Here is the minimal reproduction repository: https://github.com/pBouillon/aspire-pnpm-bug-report

To experience the same issue, you will also need to install pnpm through package manager, scoop in my case, and:

• run aspire run
• open the dashboard
• observe the frontend-installer resource failing

Exceptions (if any)

No response

.NET Version info

.NET SDK:
Version: 10.0.102
Commit: 4452502459
Workload version: 10.0.100-manifests.6d969a7e
MSBuild version: 18.0.7+445250245

Runtime Environment:
OS Name: Windows
OS Version: 10.0.26200
OS Platform: Windows
RID: win-x64
Base Path: C:\Program Files\dotnet\sdk\10.0.102\

.NET workloads installed:
There are no installed workloads to display.
Configured to use workload sets when installing new manifests.
No workload sets are installed. Run "dotnet workload restore" to install a workload set.

Host:
Version: 10.0.2
Architecture: x64
Commit: 4452502459

.NET SDKs installed:
10.0.100 [C:\Program Files\dotnet\sdk]
10.0.102 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 8.0.23 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 9.0.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 10.0.0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 10.0.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 8.0.13 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.23 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 9.0.12 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 10.0.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 10.0.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 8.0.23 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 9.0.12 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 10.0.0 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 10.0.2 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
x86 [C:\Program Files (x86)\dotnet]
registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation]

Environment variables:
Not set

global.json file:
Not found

Learn more:
https://aka.ms/dotnet/info

Download .NET:
https://aka.ms/dotnet/download

Anything else?

pnpm info from scoop:

> scoop which pnpm
~\scoop\apps\pnpm\current\pnpm.exe

> scoop info pnpm
Name        : pnpm
Description : A fast and disk space efficient Node package manager.
Version     : 10.30.3
Source      : main
Website     : https://pnpm.io
License     : MIT
Updated at  : 2026-02-26 13:33:25
Updated by  : github-actions[bot]
Installed   : 10.30.3
Binaries    : pnpm.exe | pnpx.exe

[qin-guan]

Can confirm i am getting this issue as well with mise installed pnpm

[McReaper]

Can confirm I am getting this issue as well with official npm install npm install -g pnpm or iwr https://get.pnpm.io/install.ps1 -useb | iex for pnpm.

Might be aspire's go limitations to spawn binaries on windows...

[pBouillon]

Hey, any update on this matter?