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nixos-configs/packages/claude-code/default.nix
mayor 53e3bbe78f
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fix(claude-code): preserve bun appended bundle during NixOS build
Bun standalone executables store their JavaScript code by appending it
after the ELF sections, marked with "---- Bun! ----". The standard Nix
build process was corrupting this:

- autoPatchelfHook rewrites the entire ELF, losing appended data
- strip removes data after ELF sections
- patchelf shrink-rpath also rewrites the ELF

Fix by:
- Using dontStrip and dontPatchELF to skip automatic fixup
- Manually running patchelf --set-interpreter which modifies in-place
  without rewriting the entire file structure

This restores the binary from 99MB (bare bun runtime) to 220MB (full
claude-code application).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Executed-By: mayor
Role: mayor
2026-01-19 10:39:58 -08:00

76 lines
2.7 KiB
Nix

{ lib
, stdenv
, fetchurl
, patchelf
, glibc
}:
let
version = "2.1.12";
srcs = {
aarch64-darwin = {
url = "https://storage.googleapis.com/claude-code-dist-86c565f3-f756-42ad-8dfa-d59b1c096819/claude-code-releases/${version}/darwin-arm64/claude";
sha256 = "40be59519a84bd35eb1111aa46f72aa6b3443866d3f6336252a198fdcaefbbe5";
};
x86_64-darwin = {
url = "https://storage.googleapis.com/claude-code-dist-86c565f3-f756-42ad-8dfa-d59b1c096819/claude-code-releases/${version}/darwin-x64/claude";
sha256 = "0eee4b46c91749480bf856f88e49b15a3e944faa9d346679c5f0c0d7fa6f2f54";
};
x86_64-linux = {
url = "https://storage.googleapis.com/claude-code-dist-86c565f3-f756-42ad-8dfa-d59b1c096819/claude-code-releases/${version}/linux-x64/claude";
sha256 = "3fe979215489dc1b31463fadf95ed2d2d5473a9969447bb7a46431f4578847d4";
};
aarch64-linux = {
url = "https://storage.googleapis.com/claude-code-dist-86c565f3-f756-42ad-8dfa-d59b1c096819/claude-code-releases/${version}/linux-arm64/claude";
sha256 = "e214b1d3b5afd4cd2de9177359001d41a3eb98cb1e3665fe97edc592f5aa132f";
};
};
src = srcs.${stdenv.hostPlatform.system} or (throw "Unsupported system: ${stdenv.hostPlatform.system}");
in stdenv.mkDerivation {
pname = "claude-code";
inherit version;
src = fetchurl {
inherit (src) url sha256;
};
dontUnpack = true;
dontBuild = true;
# Bun standalone binaries have JS code appended after the ELF sections
# stripping/patching would remove or corrupt this appended data
dontStrip = true;
dontPatchELF = true;
# Don't use autoPatchelfHook - it rewrites the ELF and strips the appended
# bun bundle (the JS code is appended after the ELF sections)
nativeBuildInputs = lib.optionals stdenv.isLinux [ patchelf ];
installPhase = ''
runHook preInstall
install -Dm755 $src $out/bin/claude
runHook postInstall
'';
# Manually patch the interpreter for bun standalone binaries
# patchelf --set-interpreter modifies in-place without rewriting the entire ELF,
# preserving the appended JS bundle that bun needs at runtime
postFixup = lib.optionalString stdenv.isLinux ''
interpreter="${glibc}/lib/${if stdenv.hostPlatform.system == "aarch64-linux" then "ld-linux-aarch64.so.1" else "ld-linux-x86-64.so.2"}"
patchelf --set-interpreter "$interpreter" $out/bin/claude
'';
meta = with lib; {
description = "Terminal-based AI coding assistant from Anthropic";
homepage = "https://www.anthropic.com/claude-code";
license = licenses.unfree;
maintainers = [ ];
platforms = [ "aarch64-darwin" "x86_64-darwin" "x86_64-linux" "aarch64-linux" ];
mainProgram = "claude";
};
}