Running phase: unpackPhase
unpacking source archive /nix/store/z7jzi2k5vk4622vxh1q98pb1723d5qvk-source
source root is source
Running phase: patchPhase
Executing npmConfigHook
Configuring npm
Validating consistency between /build/source/package-lock.json and /nix/store/6i028ch6kqmgfy4azp28zxn23gz2pxk7-claude-code-router-3.0.20-npm-deps/package-lock.json
Making cache writable
Setting npm_config_cache to /build/cache
Installing dependencies
/nix/store/0y8b0dqr0mly4a3zr4w3iydz3h7v6c0g-npm-config-hook/nix-support/setup-hook: line 125: npm: command not found

ERROR: npm failed to install dependencies

Here are a few things you can try, depending on the error:
1. Set `npmDepsFetcherVersion = 2` (and update `npmDepsHash`)
2. Set `makeCacheWritable = true`
  Note that this won't help if npm is complaining about not being able to write to the logs directory -- look above that for the actual error.
3. Set `npmFlags = [ "--legacy-peer-deps" ]`