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```1) rpc run test: empty (pwd=undefined,prog=/home/vova/pulumi/sdk/nodejs/bin/tests/runtime/langhost/cases/000.empty):
     Uncaught Error: spawn pulumi-language-nodejs ENOENT
      at Process.ChildProcess._handle.onexit (internal/child_process.js:240:19)
      at onErrorNT (internal/child_process.js:415:16)
      at process._tickCallback (internal/process/next_tick.js:63:19)

2) rpc run test: empty.pwd (pwd=/home/vova/pulumi/sdk/nodejs/bin/tests/runtime/langhost/cases/000.empty,prog=./):
     Uncaught Error: spawn pulumi-language-nodejs ENOENT
      at Process.ChildProcess._handle.onexit (internal/child_process.js:240:19)
      at onErrorNT (internal/child_process.js:415:16)
      at process._tickCallback (internal/process/next_tick.js:63:19)```

Have you gone all the way through <https://github.com/pulumi/pulumi/blob/master/CONTRIBUTING.md|https://github.com/pulumi/pulumi/blob/master/CONTRIBUTING.md>

Have you updated the file handle limit via `ulimit`?

BTW - the specific error suggests that `pulumi-language-nodejs` was not on your PATH.  That binary is built as part of the `pulumi/pulumi` build.  You may need to ensure your `GOBIN` is on your `PATH` .

I've repeated the instructions in the .md, have set my `GOBIN` on my `PATH` as you suggested, and after installing some more dependencies, `make` now completes as it should. Thanks a lot!