{

description = "CodeGraph – semantic code intelligence for AI agents";

inputs = {

nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";

flake-utils.url = "github:numtide/flake-utils";

};

outputs = { self, nixpkgs, flake-utils }:

flake-utils.lib.eachDefaultSystem (system:

let

pkgs = nixpkgs.legacyPackages.${system};

nodejs = pkgs.nodejs_24;

codegraph = pkgs.buildNpmPackage {

pname = "codegraph";

version =

(builtins.fromJSON (builtins.readFile ./package.json)).version;

src = ./.;

npmDeps = pkgs.fetchNpmDeps {

src = ./.;

hash = "sha256-zUdbsqQQKTH+Y3jtFGpQh3sIUTP+cnAv1NbJ0NNF98Q=";

};

inherit nodejs;

npmBuildScript = "build";

npmInstallFlags = [ "--ignore-scripts" ];

dontNpmRebuild = true;

# The build copies .wasm + schema.sql into dist/ via the

# `copy-assets` npm script (called from `build`). Nothing

# extra to do here.

installPhase = ''

runHook preInstall

# Application code

mkdir -p $out/lib/codegraph

cp -r dist $out/lib/codegraph/dist

cp package.json $out/lib/codegraph/

# Production node_modules (already populated by buildNpmPackage)

cp -r node_modules $out/lib/codegraph/node_modules

# Launcher wrapper: injects --liftoff-only so tree-sitter's

# large WASM grammars stay on V8's Liftoff baseline compiler

# and never hit the turboshaft Zone OOM (issues #293/#298).

mkdir -p $out/bin

cat > $out/bin/codegraph <<'EOF'

#!/bin/sh

exec @node@ --liftoff-only @out@/lib/codegraph/dist/bin/codegraph.js "$@"

EOF

substituteInPlace $out/bin/codegraph \

--replace-fail '@node@' '${nodejs}/bin/node' \

--replace-fail '@out@' "$out"

chmod +x $out/bin/codegraph

runHook postInstall

'';

# No native addons to build — pure JS + WASM.

dontNpmBuild = false;

meta = with pkgs.lib; {

description =

"Semantic code intelligence for AI agents — local-first knowledge graph over tree-sitter";

homepage = "https://github.com/colbymchenry/codegraph";

license = licenses.mit;

mainProgram = "codegraph";

platforms = platforms.unix;

};

};

in {

packages = {

default = codegraph;

inherit codegraph;

};

devShells.default = pkgs.mkShell {

buildInputs = [ nodejs ];

};

});

}