one of the relevent .drv's (just now got back in front of my laptop)

{
  "/nix/store/pmiv6z78s41ggicy9ii0x6f88zsgvqpv-google-chrome-stable_97.0.4692.99-1_amd64.deb.drv": {
    "outputs": {
      "out": {
        "path": "/nix/store/krzs44gfzsi8649x53jlajayv1svhpfi-google-chrome-stable_97.0.4692.99-1_amd64.deb",
        "hashAlgo": "sha256",
        "hash": "48334071fa2462698301231e9d63b647f558eecc6e60a6d9cfc71805a1564ea1"
      }
    },
    "inputSrcs": [
      "/nix/store/720ikgx7yaapyb8hvi8lkicjqwzcx3xr-builder.sh"
    ],
    "inputDrvs": {
      "/nix/store/cp60vfc62rc7rzn4ic1jv0z5rjy9b9v1-stdenv-linux.drv": [
        "out"
      ],
      "/nix/store/jv7i8m6h1lagiz8rl11prgn76vqvhr1s-mirrors-list.drv": [
        "out"
      ],
      "/nix/store/r8fpf45j4g634yvdb6sbnp4n62vq6p7x-bash-5.1-p12.drv": [
        "out"
      ],
      "/nix/store/s94w6q7nbzs2iyhd67j8sp6gcr62xkgz-curl-7.81.0.drv": [
        "dev"
      ]
    },
    "system": "x86_64-linux",
    "builder": "/nix/store/2kh3c4v2vf6d6xg6c9n8zvfpwf3zzwca-bash-5.1-p12/bin/bash",
    "args": [
      "-e",
      "/nix/store/720ikgx7yaapyb8hvi8lkicjqwzcx3xr-builder.sh"
    ],
    "env": {
      "SSL_CERT_FILE": "/no-cert-file.crt",
      "buildInputs": "",
      "builder": "/nix/store/2kh3c4v2vf6d6xg6c9n8zvfpwf3zzwca-bash-5.1-p12/bin/bash",
      "configureFlags": "",
      "curlOpts": "",
      "depsBuildBuild": "",
      "depsBuildBuildPropagated": "",
      "depsBuildTarget": "",
      "depsBuildTargetPropagated": "",
      "depsHostHost": "",
      "depsHostHostPropagated": "",
      "depsTargetTarget": "",
      "depsTargetTargetPropagated": "",
      "doCheck": "",
      "doInstallCheck": "",
      "downloadToTemp": "",
      "executable": "",
      "impureEnvVars": "http_proxy https_proxy ftp_proxy all_proxy no_proxy NIX_CURL_FLAGS NIX_HASHED_MIRRORS NIX_CONNECT_TIMEOUT NIX_MIRRORS_alsa NIX_MIRRORS_apache NIX_MIRRORS_bioc NIX_MIRRORS_bitlbee NIX_MIRRORS_centos NIX_MIRRORS_cpan NIX_MIRRORS_debian NIX_MIRRORS_fedora NIX_MIRRORS_gcc NIX_MIRRORS_gentoo NIX_MIRRORS_gnome NIX_MIRRORS_gnu NIX_MIRRORS_gnupg NIX_MIRRORS_hackage NIX_MIRRORS_hashedMirrors NIX_MIRRORS_imagemagick NIX_MIRRORS_kde NIX_MIRRORS_kernel NIX_MIRRORS_luarocks NIX_MIRRORS_maven NIX_MIRRORS_metalab NIX_MIRRORS_mozilla NIX_MIRRORS_mysql NIX_MIRRORS_openbsd NIX_MIRRORS_opensuse NIX_MIRRORS_osdn NIX_MIRRORS_postgresql NIX_MIRRORS_pypi NIX_MIRRORS_roy NIX_MIRRORS_sageupstream NIX_MIRRORS_samba NIX_MIRRORS_savannah NIX_MIRRORS_sourceforge NIX_MIRRORS_steamrt NIX_MIRRORS_testpypi NIX_MIRRORS_ubuntu NIX_MIRRORS_xfce NIX_MIRRORS_xorg",
      "mirrorsFile": "/nix/store/jvis5bmcfdwmbn5bng2xzflbig2m927q-mirrors-list",
      "name": "google-chrome-stable_97.0.4692.99-1_amd64.deb",
      "nativeBuildInputs": "/nix/store/3hdc7rmp3qc3dnagwgz2c97rkc4cljrj-curl-7.81.0-dev",
      "nixpkgsVersion": "22.05",
      "out": "/nix/store/krzs44gfzsi8649x53jlajayv1svhpfi-google-chrome-stable_97.0.4692.99-1_amd64.deb",
      "outputHash": "18afashha667rzcscq3frkp5ixa7nrirs7i3061njqi4z9ql0cs8",
      "outputHashAlgo": "sha256",
      "outputHashMode": "flat",
      "outputs": "out",
      "patches": "",
      "postFetch": "",
      "preferHashedMirrors": "1",
      "preferLocalBuild": "1",
      "propagatedBuildInputs": "",
      "propagatedNativeBuildInputs": "",
      "showURLs": "",
      "stdenv": "/nix/store/3dmq0987l5n5xybkv181flma7jaz2vh2-stdenv-linux",
      "strictDeps": "",
      "system": "x86_64-linux",
      "urls": "https://dl.google.com/linux/chrome/deb/pool/main/g/google-chrome-stable/google-chrome-stable_97.0.4692.99-1_amd64.deb http://95.31.35.30/chrome/pool/main/g/google-chrome-stable/google-chrome-stable_97.0.4692.99-1_amd64.deb http://mirror.pcbeta.com/google/chrome/deb/pool/main/g/google-chrome-stable/google-chrome-stable_97.0.4692.99-1_amd64.deb http://repo.fdzh.org/chrome/deb/pool/main/g/google-chrome-stable/google-chrome-stable_97.0.4692.99-1_amd64.deb"
    }
  }
}

        if (step->preferLocalBuild)
            features.insert("local");