diff --git a/.eslintrc.js b/.eslintrc.js
index 7834423f0ee1a89..4b7ea84daeda3f9 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -17,6 +17,7 @@ module.exports = {
     // Enable Prettier
     {
       files: [
+        'packages/kbn-build/src/**/*.js',
       ],
       plugins: [
         'prettier',
diff --git a/packages/kbn-build/src/cli.js b/packages/kbn-build/src/cli.js
index bbf07152be016c2..27c6eea55e7a49b 100644
--- a/packages/kbn-build/src/cli.js
+++ b/packages/kbn-build/src/cli.js
@@ -45,8 +45,8 @@ export async function run(argv) {
 
   const options = getopts(argv, {
     alias: {
-      h: 'help'
-    }
+      h: 'help',
+    },
   });
 
   const args = options._;
diff --git a/packages/kbn-build/src/production/__tests__/index.js b/packages/kbn-build/src/production/__tests__/index.js
index c83089955de6fa9..f38fb1d7d0e638c 100644
--- a/packages/kbn-build/src/production/__tests__/index.js
+++ b/packages/kbn-build/src/production/__tests__/index.js
@@ -11,8 +11,8 @@ import { getProjects } from '../../utils/projects';
 // and more integration-y, as we're trying to not add very slow tests to our
 // Jest unit tests.
 
-describe('kbn-build production', function () {
-  it('builds and copies projects for production', async function () {
+describe('kbn-build production', function() {
+  it('builds and copies projects for production', async function() {
     this.timeout(60 * 1000);
 
     const tmpDir = tempy.directory();
@@ -26,7 +26,7 @@ describe('kbn-build production', function () {
       cwd: fixturesPath,
       parents: true,
       nodir: true,
-      dot: true
+      dot: true,
     });
 
     const projects = await getProjects(tmpDir, ['./packages/*']);
@@ -34,14 +34,14 @@ describe('kbn-build production', function () {
     for (const project of projects.values()) {
       // This will both install dependencies and generate `yarn.lock` files
       await project.installDependencies({
-        extraArgs: ['--silent', '--no-progress']
+        extraArgs: ['--silent', '--no-progress'],
       });
     }
 
     await buildProductionProjects({ kibanaRoot: tmpDir, buildRoot });
 
     const files = await globby(['**/*', '!**/node_modules/**'], {
-      cwd: buildRoot
+      cwd: buildRoot,
     });
 
     expect(files).to.eql([
@@ -52,7 +52,7 @@ describe('kbn-build production', function () {
       'packages/foo/package.json',
       'packages/foo/src/index.js',
       'packages/foo/target/index.js',
-      'packages/foo/yarn.lock'
+      'packages/foo/yarn.lock',
     ]);
   });
 });
diff --git a/packages/kbn-build/src/production/index.js b/packages/kbn-build/src/production/index.js
index 3f4616f1603de39..bc069591e079e06 100644
--- a/packages/kbn-build/src/production/index.js
+++ b/packages/kbn-build/src/production/index.js
@@ -6,18 +6,18 @@ import { getProjectPaths } from '../config';
 import {
   getProjects,
   buildProjectGraph,
-  topologicallyBatchProjects
+  topologicallyBatchProjects,
 } from '../utils/projects';
 import {
   createProductionPackageJson,
-  writePackageJson
+  writePackageJson,
 } from '../utils/package_json';
 import { isDirectory } from '../utils/fs';
 
 export async function buildProductionProjects({ kibanaRoot, buildRoot }) {
   const projectPaths = getProjectPaths(kibanaRoot, {
     'skip-kibana': true,
-    'skip-kibana-extra': true
+    'skip-kibana-extra': true,
   });
 
   const projects = await getProductionProjects(kibanaRoot, projectPaths);
@@ -81,7 +81,7 @@ async function copyToBuild(project, kibanaRoot, buildRoot) {
     cwd: project.path,
     parents: true,
     nodir: true,
-    dot: true
+    dot: true,
   });
 
   const packageJson = project.json;
diff --git a/packages/kbn-build/src/utils/child_process.js b/packages/kbn-build/src/utils/child_process.js
index 2e9da91232c45d7..a9587d41a3b03db 100644
--- a/packages/kbn-build/src/utils/child_process.js
+++ b/packages/kbn-build/src/utils/child_process.js
@@ -16,7 +16,7 @@ function generateColors() {
 export function spawn(command, args, opts) {
   return execa(command, args, {
     ...opts,
-    stdio: 'inherit'
+    stdio: 'inherit',
   });
 }
 
@@ -25,14 +25,14 @@ const nextColor = generateColors();
 export function spawnStreaming(command, args, opts, { prefix }) {
   const spawned = execa(command, args, {
     ...opts,
-    stdio: ['ignore', 'pipe', 'pipe']
+    stdio: ['ignore', 'pipe', 'pipe'],
   });
 
   const color = nextColor();
   const prefixedStdout = logTransformer({ tag: `${color.bold(prefix)}:` });
   const prefixedStderr = logTransformer({
     tag: `${logSymbols.error} ${color.bold(prefix)}:`,
-    mergeMultiline: true
+    mergeMultiline: true,
   });
 
   spawned.stdout.pipe(prefixedStdout).pipe(process.stdout);
diff --git a/packages/kbn-build/src/utils/package_json.js b/packages/kbn-build/src/utils/package_json.js
index 54fd06a51716b4a..cf094daba30f2f6 100644
--- a/packages/kbn-build/src/utils/package_json.js
+++ b/packages/kbn-build/src/utils/package_json.js
@@ -12,7 +12,7 @@ export function writePackageJson(path, json) {
 
 export const createProductionPackageJson = pkgJson => ({
   ...pkgJson,
-  dependencies: transformDependencies(pkgJson.dependencies)
+  dependencies: transformDependencies(pkgJson.dependencies),
 });
 
 /**
diff --git a/packages/kbn-build/src/utils/project.js b/packages/kbn-build/src/utils/project.js
index d7d4bd24a25ceb6..13cec4863ee50f2 100644
--- a/packages/kbn-build/src/utils/project.js
+++ b/packages/kbn-build/src/utils/project.js
@@ -4,7 +4,7 @@ import chalk from 'chalk';
 import {
   installInDir,
   runScriptInPackage,
-  runScriptInPackageStreaming
+  runScriptInPackageStreaming,
 } from './scripts';
 import { readPackageJson } from './package_json';
 import { CliError } from './errors';
@@ -27,7 +27,7 @@ export class Project {
 
     this.allDependencies = {
       ...(this.json.devDependencies || {}),
-      ...(this.json.dependencies || {})
+      ...(this.json.dependencies || {}),
     };
 
     this.scripts = this.json.scripts || {};
@@ -53,7 +53,7 @@ export class Project {
     const meta = {
       package: `${this.name} (${this.packageJsonLocation})`,
       expected: `"${project.name}": "${expectedVersionInPackageJson}"`,
-      actual: `"${project.name}": "${versionInPackageJson}"`
+      actual: `"${project.name}": "${versionInPackageJson}"`,
     };
 
     if (versionInPackageJson.startsWith(PREFIX)) {
diff --git a/packages/kbn-build/src/utils/project.test.js b/packages/kbn-build/src/utils/project.test.js
index 7a12e84da1ed61f..ddfb6288eeb38bf 100644
--- a/packages/kbn-build/src/utils/project.test.js
+++ b/packages/kbn-build/src/utils/project.test.js
@@ -9,7 +9,7 @@ const createProjectWith = (fields, path = '') =>
     {
       name: 'kibana',
       version: '1.0.0',
-      ...fields
+      ...fields,
     },
     join(rootPath, path)
   );
@@ -25,11 +25,11 @@ describe('fromPath', () => {
 test('fields', async () => {
   const kibana = createProjectWith({
     scripts: {
-      test: 'jest'
+      test: 'jest',
     },
     dependencies: {
-      foo: '1.2.3'
-    }
+      foo: '1.2.3',
+    },
   });
 
   expect(kibana.name).toBe('kibana');
@@ -45,13 +45,13 @@ describe('#ensureValidProjectDependency', () => {
   test('valid link: version', async () => {
     const root = createProjectWith({
       dependencies: {
-        foo: 'link:packages/foo'
-      }
+        foo: 'link:packages/foo',
+      },
     });
 
     const foo = createProjectWith(
       {
-        name: 'foo'
+        name: 'foo',
       },
       'packages/foo'
     );
@@ -63,15 +63,15 @@ describe('#ensureValidProjectDependency', () => {
     const root = createProjectWith(
       {
         dependencies: {
-          foo: 'link:wrong/path'
-        }
+          foo: 'link:wrong/path',
+        },
       },
       rootPath
     );
 
     const foo = createProjectWith(
       {
-        name: 'foo'
+        name: 'foo',
       },
       'packages/foo'
     );
@@ -85,15 +85,15 @@ describe('#ensureValidProjectDependency', () => {
     const root = createProjectWith(
       {
         dependencies: {
-          foo: '1.0.0'
-        }
+          foo: '1.0.0',
+        },
       },
       rootPath
     );
 
     const foo = createProjectWith(
       {
-        name: 'foo'
+        name: 'foo',
       },
       'packages/foo'
     );
diff --git a/packages/kbn-build/src/utils/projects.js b/packages/kbn-build/src/utils/projects.js
index 9a8bc67efa76e37..5cac3c36a5c4238 100644
--- a/packages/kbn-build/src/utils/projects.js
+++ b/packages/kbn-build/src/utils/projects.js
@@ -19,7 +19,7 @@ export async function getProjects(rootPath, projectsPaths) {
 
     // Do not match ** against multiple filenames
     // (This is only specified because we currently don't have a need for it.)
-    noglobstar: true
+    noglobstar: true,
   };
   const projects = new Map();
 
@@ -36,7 +36,7 @@ export async function getProjects(rootPath, projectsPaths) {
           `There are multiple projects with the same name [${project.name}]`,
           {
             name: project.name,
-            paths: [project.path, projects.get(project.name).path]
+            paths: [project.path, projects.get(project.name).path],
           }
         );
       }
diff --git a/packages/kbn-build/src/utils/projects.test.js b/packages/kbn-build/src/utils/projects.test.js
index d71effb40ae2593..06cbe5bf83f4d93 100644
--- a/packages/kbn-build/src/utils/projects.test.js
+++ b/packages/kbn-build/src/utils/projects.test.js
@@ -3,7 +3,7 @@ import { resolve } from 'path';
 import {
   getProjects,
   buildProjectGraph,
-  topologicallyBatchProjects
+  topologicallyBatchProjects,
 } from './projects';
 
 const rootPath = resolve(`${__dirname}/__fixtures__/kibana`);
@@ -53,7 +53,7 @@ describe('#buildProjectGraph', () => {
     const projects = await getProjects(rootPath, [
       '.',
       'packages/*',
-      '../plugins/*'
+      '../plugins/*',
     ]);
     const graph = buildProjectGraph(projects);
 
@@ -71,7 +71,7 @@ describe('#topologicallyBatchProjects', () => {
     const projects = await getProjects(rootPath, [
       '.',
       'packages/*',
-      '../plugins/*'
+      '../plugins/*',
     ]);
     const graph = buildProjectGraph(projects);
 
diff --git a/packages/kbn-build/src/utils/scripts.js b/packages/kbn-build/src/utils/scripts.js
index ad0c5ca6d2bcfd6..1afba5d0dcd81e8 100644
--- a/packages/kbn-build/src/utils/scripts.js
+++ b/packages/kbn-build/src/utils/scripts.js
@@ -9,13 +9,13 @@ export function installInDir(directory, extraArgs = []) {
     'install',
     '--non-interactive',
     '--mutex file',
-    ...extraArgs
+    ...extraArgs,
   ];
 
   // We pass the mutex flag to ensure only one instance of yarn runs at any
   // given time (e.g. to avoid conflicts).
   return spawn(yarnPath, options, {
-    cwd: directory
+    cwd: directory,
   });
 }
 
@@ -24,7 +24,7 @@ export function installInDir(directory, extraArgs = []) {
  */
 export function runScriptInPackage(script, args, pkg) {
   const execOpts = {
-    cwd: pkg.path
+    cwd: pkg.path,
   };
 
   return spawn(yarnPath, ['run', script, ...args], execOpts);
@@ -35,10 +35,10 @@ export function runScriptInPackage(script, args, pkg) {
  */
 export function runScriptInPackageStreaming(script, args, pkg) {
   const execOpts = {
-    cwd: pkg.path
+    cwd: pkg.path,
   };
 
   return spawnStreaming(yarnPath, ['run', script, ...args], execOpts, {
-    prefix: pkg.name
+    prefix: pkg.name,
   });
 }