Invalid Directory Name on Starting a Resource Added with AddPnpmApp

[brady-kelly]

I'm trying to get a Nextjs app using pnpm running in my Aspire solution, but the resource fails to start with the following logged:

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

The directory and file do exist on my Windows 11 file system. The pnpm.cmd file contents are:

@SETLOCAL
@IF EXIST "%~dp0\node.exe" (
  "%~dp0\node.exe"  "%~dp0\node_modules\corepack\dist\pnpm.js" %*
) ELSE (
  @SET PATHEXT=%PATHEXT:;.JS;=;%
  node  "%~dp0\node_modules\corepack\dist\pnpm.js" %*
)

I'm adding the resource with this code in app host:

var nextFrontend = builder
    .AddPnpmApp("frontend", ".​.​/​frontend", "dev")
    .WithWorkingDirectory(Path.GetFullPath("../frontend"))
    .WithPnpmPackageInstallation()
    .WaitFor(server)
    .WithReference(server)
    .WithHttpEndpoint(env: "PORT") 
    .WithExternalHttpEndpoints();