buildNpmPackage: use nodejs patch flag to work around roadblocks

      name = "npm-config-hook";

      substitutions = {

        nodeSrc = srcOnly nodejs;

        nodeGyp = "${buildPackages.nodejs}/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js";

        # Specify `diff`, `jq`, and `prefetch-npm-deps` by abspath to ensure that the user's build

        # inputs do not cause us to find the wrong binaries.

npmConfigHook() {

    echo "Executing npmConfigHook"

    # Use npm patches in the nodejs package

    export NIX_NODEJS_BUILDNPMPACKAGE=1

    export prefetchNpmDeps="@prefetchNpmDeps@"

    echo "Configuring npm"

    export HOME="$TMPDIR"

    export npm_config_nodedir="@nodeSrc@"

    export npm_config_node_gyp="@nodeGyp@"

    if [ -z "${npmDeps-}" ]; then

        echo

    patchShebangs node_modules

    local -r lockfileVersion="$(@jq@ .lockfileVersion package-lock.json)"

    if (( lockfileVersion < 2 )); then

      # This is required because npm consults a hidden lockfile in node_modules to figure out

      # what to create bin links for. When using an old lockfile offline, this hidden lockfile

      # contains insufficent data, making npm silently fail to create links. The hidden lockfile

      # is bypassed when any file in node_modules is newer than it. Thus, we create a file when

      # using an old lockfile, so bin links work as expected without having to downgrade Node or npm.

      touch node_modules/.meow

    fi

    npm rebuild "${npmRebuildFlags[@]}" "${npmFlags[@]}"

    if (( lockfileVersion < 2 )); then

      rm node_modules/.meow

    fi

    npm rebuild $npmRebuildFlags "${npmRebuildFlagsArray[@]}" $npmFlags "${npmFlagsArray[@]}"

    patchShebangs node_modules