pnpm with Workers Builds

What's the best way to use pnpm with Workers Builds? Build output suggests it's detected but not installed.

09:12:56.850    Initializing build environment...
09:13:07.058    Success: Finished initializing build environment
09:13:07.184    Cloning repository...
09:13:09.031    Detected the following tools from environment: pnpm@9.10.0, nodejs@22.9.0
09:13:09.034    Restoring from dependencies cache
09:13:09.036    Restoring from build output cache
09:13:09.290    Installing project dependencies: pnpm install --frozen-lockfile
09:13:09.527    No preset version installed for command pnpm

09:12:56.850    Initializing build environment...
09:13:07.058    Success: Finished initializing build environment
09:13:07.184    Cloning repository...
09:13:09.031    Detected the following tools from environment: pnpm@9.10.0, nodejs@22.9.0
09:13:09.034    Restoring from dependencies cache
09:13:09.036    Restoring from build output cache
09:13:09.290    Installing project dependencies: pnpm install --frozen-lockfile
09:13:09.527    No preset version installed for command pnpm

Jürgen Leschner•1/3/25, 4:41 PM

maybe try to clear the build cache or delete/regenerate the lockfile? Looks like a version mismatch from the log above

KrisOP•1/3/25, 4:42 PM

It seems I need to make match the installed versions, or override the installed versions to match . Too bad Workers Builds doesn't just pick up the versions in when setting up the environment.

Jürgen Leschner•1/4/25, 8:22 PM

@Kris it appears that you can set the desired pnpm version in the workers build config (like for cloudflare pages described here)

Jürgen Leschner•1/4/25, 8:22 PM

Jürgen Leschner•1/4/25, 8:23 PM

Note PNPM v8.x

Jürgen Leschner•1/4/25, 8:27 PM

Setting the PNPM_VERSION for the build, also appears to force the use of pnpm over npm, even if there is no lockfile (TIL

)

Jürgen Leschner•1/4/25, 8:39 PM

And if you set the version to 9, it will pull the latest (v9.15.2) even if the build environment already has say v9.10 installed.

KrisOP•1/4/25, 11:19 PM

Thanks, yes, I've set so an update doesn't break the build. I just wish it got the value from so I don't need to remember to update the build config when we change the version.