diff --git a/bin/main.test.js b/bin/main.test.js
index aee63c868..332e42196 100644
--- a/bin/main.test.js
+++ b/bin/main.test.js
@@ -160,6 +160,7 @@ beforeEach(() => {
     CHROMATIC_PROJECT_TOKEN: undefined,
   };
   execa.mockReset();
+  execa.mockReturnValue({ stdout: '1.2.3' });
 });
 afterEach(() => {
   process.env = processEnv;
diff --git a/bin/tasks/build.js b/bin/tasks/build.js
index 37d6073a8..026d98447 100644
--- a/bin/tasks/build.js
+++ b/bin/tasks/build.js
@@ -3,7 +3,6 @@ import fs from 'fs-extra';
 import path from 'path';
 import semver from 'semver';
 import tmp from 'tmp-promise';
-import yarnOrNpm, { spawn } from 'yarn-or-npm';
 
 import { createTask, transitionTo } from '../lib/tasks';
 import buildFailed from '../ui/messages/errors/buildFailed';
@@ -21,23 +20,36 @@ export const setSourceDir = async (ctx) => {
   }
 };
 
-export const setSpawnParams = (ctx) => {
+export const setSpawnParams = async (ctx) => {
   const webpackStatsSupported = semver.gte(semver.coerce(ctx.storybook.version), '6.2.0');
   if (ctx.git.changedFiles && !webpackStatsSupported) {
     ctx.log.warn('Storybook version 6.2.0 or later is required to use the --only-changed flag');
   }
-  const client = yarnOrNpm();
-  const { stdout } = spawn.sync(['--version']);
+
+  // Run either:
+  //   node path/to/npm-cli.js run build-storybook
+  //   node path/to/yarn.js run build-storybook
+  //   npm run build-storybook
+  // Based on https://github.com/mysticatea/npm-run-all/blob/52eaf86242ba408dedd015f53ca7ca368f25a026/lib/run-task.js#L156-L174
+  const npmExecPath = process.env.npm_execpath;
+  const npmExecFile = npmExecPath && path.basename(npmExecPath);
+  const isJsPath = npmExecFile && /\.m?js$/.test(npmExecFile);
+  const isYarn = npmExecFile && npmExecFile.includes('yarn');
+  const isNpx = npmExecFile && npmExecFile.includes('npx');
+
+  const client = isYarn ? 'yarn' : 'npm';
+  const { stdout } = await execa(client, ['--version']);
   const clientVersion = stdout && stdout.toString().trim();
+
   ctx.spawnParams = {
     client,
     clientVersion,
     platform: process.platform,
-    command: client,
-    clientArgs: ['run', '--silent'],
+    command: (!isNpx && (isJsPath ? process.execPath : npmExecPath)) || 'npm',
+    clientArgs: !isNpx && isJsPath ? [npmExecPath, 'run'] : ['run', '--silent'],
     scriptArgs: [
       ctx.options.buildScriptName,
-      client === 'yarn' ? '' : '--',
+      isYarn ? '' : '--',
       '--output-dir',
       ctx.sourceDir,
       ctx.git.changedFiles && webpackStatsSupported && '--webpack-stats-json',
diff --git a/bin/tasks/build.test.js b/bin/tasks/build.test.js
index 58be568b5..32219f235 100644
--- a/bin/tasks/build.test.js
+++ b/bin/tasks/build.test.js
@@ -1,15 +1,8 @@
 import execa from 'execa';
-import yarnOrNpm, { spawn } from 'yarn-or-npm';
 
 import { buildStorybook, setSourceDir, setSpawnParams } from './build';
 
 jest.mock('execa');
-jest.mock('yarn-or-npm');
-
-beforeEach(() => {
-  yarnOrNpm.mockReturnValue('npm');
-  spawn.sync.mockReturnValue({ stdout: '1.2.3' });
-});
 
 describe('setSourceDir', () => {
   it('sets a random temp directory path on the context', async () => {
@@ -38,6 +31,13 @@ describe('setSourceDir', () => {
 });
 
 describe('setSpawnParams', () => {
+  const npmExecPath = process.env.npm_execpath;
+
+  beforeEach(() => {
+    process.env.npm_execpath = npmExecPath;
+    execa.mockReturnValue({ stdout: '1.2.3' });
+  });
+
   it('sets the spawn params on the context', async () => {
     process.env.npm_execpath = 'npm';
     const ctx = {
@@ -69,7 +69,7 @@ describe('setSpawnParams', () => {
   });
 
   it('supports yarn', async () => {
-    yarnOrNpm.mockReturnValue('yarn');
+    process.env.npm_execpath = '/path/to/yarn.js';
     const ctx = {
       sourceDir: './source-dir/',
       options: { buildScriptName: 'build:storybook' },
@@ -81,8 +81,8 @@ describe('setSpawnParams', () => {
       client: 'yarn',
       clientVersion: '1.2.3',
       platform: expect.stringMatching(/darwin|linux|win32/),
-      command: 'yarn',
-      clientArgs: ['run', '--silent'],
+      command: expect.stringMatching(/node/),
+      clientArgs: ['/path/to/yarn.js', 'run'],
       scriptArgs: ['build:storybook', '--output-dir', './source-dir/'],
       spawnOptions: {
         preferLocal: true,