{
  lib,
  php,

  src,
  vendorHash,
  addonRepos ? [],
  themeRepos ? []
}:

php.buildComposerProject {
  pname = "streams";
  version = "25.4.2";
  inherit src vendorHash;

  postInstall = ''
    # Override composerInstallHook's output location
    rm -rf $out
    cp -r . $out

    # Ugly hack: These locations need to be writable,
    # so link them to outside of the Nix store
    ln -s /var/lib/streams/store $out/store
    ln -s /var/lib/streams/cache $out/cache
    ln -s /var/lib/streams/config.php $out/.htconfig.php

    # Install addons and themes

    mkdir $out/addon
    for repo in ${lib.concatStringsSep " " addonRepos}; do
        filelist=(`ls $repo`)
        for a in "''${filelist[@]}" ; do
            if [ $a = 'version.php' ]; then
                if [ ! -x $out/addon/version.php ]; then
                    ln -s $repo/version.php $out/addon/version.php
                fi
            fi
            base=`basename $a`
            if [ $base = '.git' ]; then
                continue;
            fi
            if [ ! -d $repo/$base ]; then
                continue;
            fi
            if [ -x $out/addon/$base ]; then
                continue;
            fi
            ln -s $repo/$base $out/addon/$base
        done
    done

    for repo in ${lib.concatStringsSep " " themeRepos}; do
        filelist=(`ls $repo`)
        for a in "''${filelist[@]}" ; do
            base=`basename $a`
            if [ $base = '.git' ]; then
                continue;
            fi
            if [ ! -d $repo/$base ]; then
                continue;
            fi
            if [ -x $out/view/theme/$base ]; then
                continue;
            fi
            ln -s $repo/$base $out/view/theme/$base
        done
    done
  '';
}