message: Don't bother.
diff: import execa from 'execa';
  -import fs from 'fs-extra';
  +import fs from 'fs';
  import path from 'path';
  import semver from 'semver';
  import tmp from 'tmp-promise';
  @@ -52,7 +52,7 @@ export const buildStorybook = async ctx => {
  const { command, clientArgs, scriptArgs } = ctx.spawnParams;
  await execa(command, [...clientArgs, ...scriptArgs], { stdio: [null, logFile, logFile] });
  } catch (e) {
  - const buildLog = await fs.readFile(ctx.buildLogFile, 'utf8');
  + const buildLog = fs.readFileSync(ctx.buildLogFile, 'utf8');
  ctx.log.error(buildFailed(ctx, e, buildLog));
  ctx.exitCode = 201;
  ctx.userError = true;
  