message: cli: Use yn to parse env for build cache
diff: @@ -35,6 +35,7 @@ import { paths as cliPaths } from '../../lib/paths';
  import { runPlain } from '../run';
  import ESLintPlugin from 'eslint-webpack-plugin';
  import pickBy from 'lodash/pickBy';
  +import yn from 'yn';
  const BUILD_CACHE_ENV_VAR = 'BACKSTAGE_CLI_EXPERIMENTAL_BUILD_CACHE';
  @@ -148,6 +149,8 @@ export async function createConfig(
  require.resolve('react-refresh'),
  ];
  + const withCache = yn(process.env[BUILD_CACHE_ENV_VAR], { default: false });
  +
  return {
  mode: isDev ? 'development' : 'production',
  profile: false,
  @@ -208,7 +211,7 @@ export async function createConfig(
  : {}),
  },
  plugins,
  - ...(process.env[BUILD_CACHE_ENV_VAR]
  + ...(withCache
  ? {
  cache: {
  type: 'filesystem',
  