Description

The postinstall.mjs script creates a symlink from bin/opencode to the native binary on non-Windows platforms. However, the bin/opencode file is a Node.js wrapper script that's designed to locate and execute the platform-specific binary.

When the postinstall script replaces this wrapper with a symlink to the native binary, the system tries to execute the binary using the Node.js shebang (#!/usr/bin/env node), which fails because the binary is a native executable, not a Node.js script.

Plugins

No response

OpenCode version

No response

Steps to reproduce

1. Install with pnpm:

   $ pnpm add -g opencode-ai
    WARN  4 deprecated subdependencies found: @koa/[email protected], [email protected], [email protected], [email protected]
   Packages: +2
   ++
   Progress: resolved 679, reused 651, downloaded 0, added 0, done

2. Start wrapper script opencode before running postinstall script:

   $ opencode --version
   1.13.1

3. Run the postinstall script from opencode-ai:

   $ pnpm approve-builds -g
   ✔ Choose which packages to build (Press <space> to select, <a> to toggle all, <i> to invert selection) · opencode-ai
   ✔ The next packages will now be built: opencode-ai.
   Do you approve? (y/N) · true
   .pnpm/[email protected]/node_modules/opencode-ai: Running postinstall script, done in 37ms

4. Start wrapper script again:

   $ opencode --version
   /Users/chuck/Library/pnpm/global/5/.pnpm/[email protected]/node_modules/opencode-darwin-arm64/bin/opencode:1
   ����
   
   
   
   SyntaxError: Invalid or unexpected token
       at wrapSafe (node:internal/modules/cjs/loader:1638:18)
       at Module._compile (node:internal/modules/cjs/loader:1680:20)
       at Object..js (node:internal/modules/cjs/loader:1839:10)
       at Module.load (node:internal/modules/cjs/loader:1441:32)
       at Function._load (node:internal/modules/cjs/loader:1263:12)
       at TracingChannel.traceSync (node:diagnostics_channel:328:14)
       at wrapModuleLoad (node:internal/modules/cjs/loader:237:24)
       at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:171:5)
       at node:internal/main/run_main_module:36:49
   
   Node.js v22.21.1

Screenshot and/or share link

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Operating System

macOS 26.3

Terminal

Ghostty