can1357/oh-my-pi · error · Error

Could not create /opt/omp: ${mkdir.stderr.trim()}

Error message

Could not create /opt/omp: ${mkdir.stderr.trim()}

What it means

installAgent provisions the omp binary inside a trial VM. Before copying the binary it runs `mkdir -p /opt/omp` via vm.exec; a non-zero exit code means the guest could not create the install directory, so this error is thrown with the VM's captured stderr appended for diagnosis.

Source

Thrown at packages/metaharness/src/tb/agent.ts:95

			if (!(await Bun.file(source).exists())) throw new Error(`Binary build did not produce ${source}`);
			await Bun.write(destination, Bun.file(source));
			await fs.chmod(destination, 0o755);
		}
	}

	const binaries: AgentBinaries = { version: manifest.version };
	for (const arch of arches) binaries[arch] = cached[arch];
	return binaries;
}

/** Install omp and gateway-only configuration into one running trial microVM. */
export async function installAgent(vm: TrialVm, binaries: AgentBinaries, gateway: GatewayConfig): Promise<string> {
	const binary = binaries[vm.arch];
	if (!binary) throw new Error(`No omp binary available for guest architecture ${vm.arch}`);

	const entrypoint = "/opt/omp/omp";
	const mkdir = await vm.exec("mkdir -p /opt/omp");
	if (mkdir.exitCode !== 0) throw new Error(`Could not create /opt/omp: ${mkdir.stderr.trim()}`);
	await vm.copyTo(binary, entrypoint);
	const chmod = await vm.exec(`chmod 755 ${shellQuote(entrypoint)}`);
	if (chmod.exitCode !== 0) throw new Error(`Could not make omp executable: ${chmod.stderr.trim()}`);
	const warmup = await vm.exec(`${shellQuote(entrypoint)} --version`);
	if (warmup.exitCode !== 0) throw new Error(`omp --version failed: ${warmup.stderr.trim()}`);

	const providers = [...new Set(gateway.providers)];
	const modelLines = ["# Generated by metaharness — auth via host pm2 gateway.", "providers:"];
	for (const provider of providers) {
		modelLines.push(`  ${provider}:`);
		modelLines.push(`    baseUrl: ${gateway.url}`);
		modelLines.push("    auth: oauth");
		modelLines.push("    transport: pi-native");
		modelLines.push(`    apiKey: ${gateway.token}`);
	}
	const modelsYaml = `${modelLines.join("\n")}\n`;
	const configYaml = `providers:
  openrouterVariant: ${gateway.openrouterVariant}

View on GitHub (pinned to 9690622007)

Solutions

1. Read the stderr in the message to identify the guest-side cause
2. Verify the VM is running and vm.exec can reach it (run a trivial command like `true`)
3. Check that the guest root filesystem is writable and not full (df -h, touch a file in /)
4. Ensure /opt/omp does not exist as a regular file or symlink in the VM image
5. Rebuild or restart the trial VM from a clean image

Example fix

// before (broken image: /opt/omp is a file)
const mkdir = await vm.exec("mkdir -p /opt/omp");
// after: pre-clean the image or guard in provisioning
await vm.exec("rm -f /opt/omp && mkdir -p /opt/omp");

const probe = await vm.exec("mkdir -p /opt/omp && test -w /opt/omp");
if (probe.exitCode !== 0) throw new Error(`VM /opt not writable: ${probe.stderr.trim()}`);

try {
  await installAgent(vm, binaries, gateway);
} catch (err) {
  if (String(err.message).includes("Could not create /opt/omp")) {
    // inspect err.message stderr, reprovision VM
  }
  throw err;
}

When it happens

Trigger: vm.exec("mkdir -p /opt/omp") returns a non-zero exitCode — e.g. the guest filesystem is read-only, /opt/omp exists as a non-directory, the VM is booted into recovery/rescue mode, or the exec transport itself fails and surfaces a shell error.

Common situations: Trial VM images mounted read-only or with a full root disk; a broken snapshot where /opt/omp is a stale file; ssh/exec into the VM failing so stderr carries 'connection refused' style text; hypervisor misconfiguration preventing boot.

Related errors

• Could not make omp executable: ${chmod.stderr.trim()}
• Could not create log directories: ${logDirs.stderr.trim()}
• unknown filetype: {ft_debug}
• Is a directory
• Too many levels of symbolic links

AI-assisted analysis of can1357/oh-my-pi@9690622007 (2026-08-31). Data as JSON: /api/errors/d54df9d2f31bdf49. Report an issue: GitHub.