Description

Note: This as an AI-generated issue, but I have gone over it and it is at least as good as anything I would have managed:

Problem
The Nix flake build fails when nixpkgs has an older Bun version than what's specified in package.json's packageManager field.
error: This script requires bun@^1.3.10, but you are using bun@1.3.9
This occurs because:

1. The flake uses pkgs.bun from nixpkgs (currently 1.3.9)
2. package.json specifies "packageManager": "bun@1.3.10"
3. packages/script/src/index.ts:15 enforces this version at runtime
   Current Behavior
   Users building opencode via the Nix flake are blocked when nixpkgs lags behind the required Bun version.
   Suggested Solutions
   Option 1: Pin Bun version in flake
   Instead of relying on nixpkgs' bun, fetch the specific version:
   bun = pkgs.stdenv.mkDerivation {
   name = "bun-${version}";
   src = pkgs.fetchzip {
   url = "https://github.com/oven-sh/bun/releases/download/bun-v${version}/bun-linux-x64.zip";
   hash = "sha256-...";
   };
   installPhase = "mkdir -p $out/bin && cp bun $out/bin/";
   };
   Option 2: Relax version check for Nix builds
   Make the version check a warning instead of an error, or skip it when NIX_BUILD_TOP is set (indicating a Nix build environment).
   if (!semver.satisfies(process.versions.bun, expectedBunVersionRange)) {
   if (process.env.NIX_BUILD_TOP) {
   console.warn(Warning: Expected bun@${expectedBunVersionRange}, got bun@${process.versions.bun});
   } else {
   throw new Error(This script requires bun@${expectedBunVersionRange}, but you are using bun@${process.versions.bun});
   }
   }
   Workaround
   Users can override bun in their own flake, but this requires maintaining a separate overlay.

Plugins

No response

OpenCode version

1.2.15

Steps to reproduce

nix run github:anomalyco/opencode (commit a94f564)

produces

error: Cannot build '/nix/store/dp9mb7ylrwjx1nmir78204lj1x1cszwi-opencode-1.2.15-a94f564.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/3zmxsvdf0x7wlaaizbhyp3vjqhlzw3py-opencode-1.2.15-a94f564
       Last 19 log lines:
       > Using versionCheckHook
       > Running phase: unpackPhase
       > unpacking source archive /nix/store/rrr8svra75mrzca0mwq0bhvawn98p4cm-source
       > source root is source
       > Running phase: patchPhase
       > Running phase: updateAutotoolsGnuConfigScriptsPhase
       > Running phase: configurePhase
       > Running phase: buildPhase
       > 11 |
       > 12 | // relax version requirement
       > 13 | const expectedBunVersionRange = `^${expectedBunVersion}`
       > 14 |
       > 15 | if (!semver.satisfies(process.versions.bun, expectedBunVersionRange)) {
       > 16 |   throw new Error(`This script requires bun@${expectedBunVersionRange}, but you are using bun@${process.versions.bun}`)
       >                  ^
       > error: This script requires bun@^1.3.10, but you are using bun@1.3.9
       >       at /build/source/packages/script/src/index.ts:16:13
       >
       > Bun v1.3.9 (Linux x64)
       For full logs, run:
         nix log /nix/store/dp9mb7ylrwjx1nmir78204lj1x1cszwi-opencode-1.2.15-a94f564.drv

Screenshot and/or share link

No response

Operating System

Nixos 25.11

Terminal

Ghostty