diff --git a/bin/packages/get-babel-config.js b/bin/packages/get-babel-config.js
index e79bc306d07c4..b2646da46955c 100644
--- a/bin/packages/get-babel-config.js
+++ b/bin/packages/get-babel-config.js
@@ -10,14 +10,7 @@ const babel = require( '@babel/core' );
 const { options: babelDefaultConfig } = babel.loadPartialConfig( {
 	configFile: '@wordpress/babel-preset-default',
 } );
-const plugins = babelDefaultConfig.plugins;
-if ( ! process.env.SKIP_JSX_PRAGMA_TRANSFORM ) {
-	plugins.push( [ '@wordpress/babel-plugin-import-jsx-pragma', {
-		scopeVariable: 'createElement',
-		source: '@wordpress/element',
-		isDefault: false,
-	} ] );
-}
+const { plugins, presets } = babelDefaultConfig;
 
 const overrideOptions = ( target, targetName, options ) => {
 	if ( get( target, [ 'file', 'request' ] ) === targetName ) {
@@ -37,7 +30,7 @@ const babelConfigs = {
 		{
 			plugins,
 			presets: map(
-				babelDefaultConfig.presets,
+				presets,
 				( preset ) => overrideOptions( preset, '@babel/preset-env', {
 					modules: 'commonjs',
 				} )
@@ -55,7 +48,7 @@ const babelConfigs = {
 				} )
 			),
 			presets: map(
-				babelDefaultConfig.presets,
+				presets,
 				( preset ) => overrideOptions( preset, '@babel/preset-env', {
 					modules: false,
 				} )
diff --git a/bin/packages/get-packages.js b/bin/packages/get-packages.js
index 30093a22abba6..ed271db0434f2 100644
--- a/bin/packages/get-packages.js
+++ b/bin/packages/get-packages.js
@@ -3,7 +3,7 @@
  */
 const fs = require( 'fs' );
 const path = require( 'path' );
-const { overEvery, compact, includes, negate } = require( 'lodash' );
+const { overEvery } = require( 'lodash' );
 
 /**
  * Absolute path to packages directory.
@@ -12,36 +12,6 @@ const { overEvery, compact, includes, negate } = require( 'lodash' );
  */
 const PACKAGES_DIR = path.resolve( __dirname, '../../packages' );
 
-const {
-	/**
-	 * Comma-separated string of packages to include in build.
-	 *
-	 * @type {string}
-	 */
-	INCLUDE_PACKAGES,
-
-	/**
-	 * Comma-separated string of packages to exclude from build.
-	 *
-	 * @type {string}
-	 */
-	EXCLUDE_PACKAGES,
-} = process.env;
-
-/**
- * Given a comma-separated string, returns a filter function which returns true
- * if the item is contained within as a comma-separated entry.
- *
- * @param {Function} filterFn Filter function to call with item to test.
- * @param {string}   list     Comma-separated list of items.
- *
- * @return {Function} Filter function.
- */
-const createCommaSeparatedFilter = ( filterFn, list ) => {
-	const listItems = list.split( ',' );
-	return ( item ) => filterFn( listItems, item );
-};
-
 /**
  * Returns true if the given base file name for a file within the packages
  * directory is itself a directory.
@@ -62,11 +32,7 @@ function isDirectory( file ) {
  *
  * @return {boolean} Whether to include file in build.
  */
-const filterPackages = overEvery( compact( [
-	isDirectory,
-	INCLUDE_PACKAGES && createCommaSeparatedFilter( includes, INCLUDE_PACKAGES ),
-	EXCLUDE_PACKAGES && createCommaSeparatedFilter( negate( includes ), EXCLUDE_PACKAGES ),
-] ) );
+const filterPackages = overEvery( isDirectory );
 
 /**
  * Returns the absolute path of all WordPress packages
diff --git a/package-lock.json b/package-lock.json
index 30246ca516f38..e46af7f835f3e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2283,10 +2283,7 @@
 		},
 		"@wordpress/babel-plugin-import-jsx-pragma": {
 			"version": "file:packages/babel-plugin-import-jsx-pragma",
-			"dev": true,
-			"requires": {
-				"@babel/runtime": "^7.0.0"
-			}
+			"dev": true
 		},
 		"@wordpress/babel-plugin-makepot": {
 			"version": "file:packages/babel-plugin-makepot",
@@ -2308,6 +2305,7 @@
 				"@babel/plugin-transform-runtime": "^7.0.0",
 				"@babel/preset-env": "^7.0.0",
 				"@babel/runtime": "^7.0.0",
+				"@wordpress/babel-plugin-import-jsx-pragma": "file:packages/babel-plugin-import-jsx-pragma",
 				"@wordpress/browserslist-config": "file:packages/browserslist-config",
 				"babel-core": "^7.0.0-bridge.0"
 			}
@@ -2740,7 +2738,6 @@
 			"version": "file:packages/postcss-themes",
 			"dev": true,
 			"requires": {
-				"@babel/runtime": "^7.0.0",
 				"autoprefixer": "^9.4.5",
 				"postcss": "^7.0.13",
 				"postcss-color-function": "^4.0.1"
diff --git a/package.json b/package.json
index c59a6c200a189..527b4d5bd2945 100644
--- a/package.json
+++ b/package.json
@@ -147,8 +147,8 @@
 	"scripts": {
 		"prebuild": "npm run check-engines",
 		"clean:packages": "rimraf ./packages/*/build ./packages/*/build-module ./packages/*/build-style",
-		"prebuild:packages": "npm run clean:packages && lerna run build && cross-env INCLUDE_PACKAGES=babel-plugin-import-jsx-pragma,postcss-themes,jest-console SKIP_JSX_PRAGMA_TRANSFORM=1 node ./bin/packages/build.js",
-		"build:packages": "cross-env EXCLUDE_PACKAGES=babel-plugin-import-jsx-pragma,jest-console,postcss-themes node ./bin/packages/build.js",
+		"prebuild:packages": "npm run clean:packages && lerna run build",
+		"build:packages": "node ./bin/packages/build.js",
 		"build": "npm run build:packages && wp-scripts build",
 		"check-engines": "wp-scripts check-engines",
 		"check-licenses": "concurrently \"wp-scripts check-licenses --prod --gpl2\" \"wp-scripts check-licenses --dev\"",
diff --git a/packages/babel-plugin-import-jsx-pragma/CHANGELOG.md b/packages/babel-plugin-import-jsx-pragma/CHANGELOG.md
index 33b89b5ae57b0..852dbcaf235c1 100644
--- a/packages/babel-plugin-import-jsx-pragma/CHANGELOG.md
+++ b/packages/babel-plugin-import-jsx-pragma/CHANGELOG.md
@@ -1,3 +1,9 @@
+## 2.0.0 (Unreleased)
+
+### Breaking change
+
+- Stop using Babel transpilation internally and set node 8 as a minimal version required ([#13540](https://github.com/WordPress/gutenberg/pull/13540)).
+
 ## 1.1.0 (2018-09-05)
 
 ### New Feature
diff --git a/packages/babel-plugin-import-jsx-pragma/src/index.js b/packages/babel-plugin-import-jsx-pragma/index.js
similarity index 96%
rename from packages/babel-plugin-import-jsx-pragma/src/index.js
rename to packages/babel-plugin-import-jsx-pragma/index.js
index 89963e67d27e8..7b69a3d7bc72e 100644
--- a/packages/babel-plugin-import-jsx-pragma/src/index.js
+++ b/packages/babel-plugin-import-jsx-pragma/index.js
@@ -26,15 +26,12 @@ const DEFAULT_OPTIONS = {
  *
  * @return {Object} Babel transform plugin.
  */
-export default function( babel ) {
+module.exports = function( babel ) {
 	const { types: t } = babel;
 
 	function getOptions( state ) {
 		if ( ! state._options ) {
-			state._options = {
-				...DEFAULT_OPTIONS,
-				...state.opts,
-			};
+			state._options = Object.assign( {}, DEFAULT_OPTIONS, state.opts );
 		}
 
 		return state._options;
@@ -99,4 +96,4 @@ export default function( babel ) {
 			},
 		},
 	};
-}
+};
diff --git a/packages/babel-plugin-import-jsx-pragma/package.json b/packages/babel-plugin-import-jsx-pragma/package.json
index 12637993733e6..1adcaa57b9caa 100644
--- a/packages/babel-plugin-import-jsx-pragma/package.json
+++ b/packages/babel-plugin-import-jsx-pragma/package.json
@@ -19,15 +19,13 @@
 	"bugs": {
 		"url": "https://github.com/WordPress/gutenberg/issues"
 	},
+	"engines": {
+		"node": ">=8"
+	},
 	"files": [
-		"build",
-		"build-module"
+		"index.js"
 	],
-	"main": "build/index.js",
-	"module": "build-module/index.js",
-	"dependencies": {
-		"@babel/runtime": "^7.0.0"
-	},
+	"main": "index.js",
 	"peerDependencies": {
 		"@babel/core": "^7.0.0"
 	},
diff --git a/packages/babel-plugin-import-jsx-pragma/test/index.js b/packages/babel-plugin-import-jsx-pragma/test/index.js
index 800b75e9727d6..13d299b462606 100644
--- a/packages/babel-plugin-import-jsx-pragma/test/index.js
+++ b/packages/babel-plugin-import-jsx-pragma/test/index.js
@@ -6,7 +6,7 @@ import { transformSync } from '@babel/core';
 /**
  * Internal dependencies
  */
-import plugin from '../src';
+import plugin from '../';
 
 describe( 'babel-plugin-import-jsx-pragma', () => {
 	function getTransformedCode( source, options = {} ) {
diff --git a/packages/babel-preset-default/CHANGELOG.md b/packages/babel-preset-default/CHANGELOG.md
index 532f693d43279..0d12ff6ade95b 100644
--- a/packages/babel-preset-default/CHANGELOG.md
+++ b/packages/babel-preset-default/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 ## Braking change
 
-- Plugin updated to include `@wordpress/babel-plugin-import-jsx-pragma` plugin integration.
+- Preset updated to include `@wordpress/babel-plugin-import-jsx-pragma` plugin integration ([#13540](https://github.com/WordPress/gutenberg/pull/13540)).
 
 ## 3.0.0 (2018-09-30)
 
diff --git a/packages/babel-preset-default/package.json b/packages/babel-preset-default/package.json
index 1a22f93300864..36ab1cbdbb015 100644
--- a/packages/babel-preset-default/package.json
+++ b/packages/babel-preset-default/package.json
@@ -21,6 +21,9 @@
 	"engines": {
 		"node": ">=8"
 	},
+	"files": [
+		"index.js"
+	],
 	"main": "index.js",
 	"dependencies": {
 		"@babel/core": "^7.0.0",
@@ -30,6 +33,7 @@
 		"@babel/plugin-transform-runtime": "^7.0.0",
 		"@babel/preset-env": "^7.0.0",
 		"@babel/runtime": "^7.0.0",
+		"@wordpress/babel-plugin-import-jsx-pragma": "file:../babel-plugin-import-jsx-pragma",
 		"@wordpress/browserslist-config": "file:../browserslist-config",
 		"babel-core": "^7.0.0-bridge.0"
 	},
diff --git a/packages/postcss-themes/CHANGELOG.md b/packages/postcss-themes/CHANGELOG.md
new file mode 100644
index 0000000000000..23a814422fd86
--- /dev/null
+++ b/packages/postcss-themes/CHANGELOG.md
@@ -0,0 +1,5 @@
+## 2.0.0 (Unreleased)
+
+### Breaking change
+
+- Stop using Babel transpilation internally and set node 8 as a minimal version required ([#13540](https://github.com/WordPress/gutenberg/pull/13540)).
diff --git a/packages/postcss-themes/src/index.js b/packages/postcss-themes/index.js
similarity index 98%
rename from packages/postcss-themes/src/index.js
rename to packages/postcss-themes/index.js
index 5018a0dd39a4e..9c7dd80c64501 100644
--- a/packages/postcss-themes/src/index.js
+++ b/packages/postcss-themes/index.js
@@ -1,3 +1,6 @@
+/**
+ * External dependencies
+ */
 const postcss = require( 'postcss' );
 
 module.exports = postcss.plugin( 'postcss-themes', function( options ) {
diff --git a/packages/postcss-themes/package.json b/packages/postcss-themes/package.json
index ced2f27afbd11..4f5f233ac4eb6 100644
--- a/packages/postcss-themes/package.json
+++ b/packages/postcss-themes/package.json
@@ -20,13 +20,14 @@
 	"bugs": {
 		"url": "https://github.com/WordPress/gutenberg/issues"
 	},
+	"engines": {
+		"node": ">=8"
+	},
 	"files": [
-		"build",
-		"build-module"
+		"index.js"
 	],
-	"main": "build/index.js",
+	"main": "index.js",
 	"dependencies": {
-		"@babel/runtime": "^7.0.0",
 		"autoprefixer": "^9.4.5",
 		"postcss": "^7.0.13",
 		"postcss-color-function": "^4.0.1"
diff --git a/packages/postcss-themes/test/index.js b/packages/postcss-themes/test/index.js
index 9a670ba55a588..45a058d6e2a31 100644
--- a/packages/postcss-themes/test/index.js
+++ b/packages/postcss-themes/test/index.js
@@ -6,7 +6,7 @@ import postcss from 'postcss';
 /**
  * Internal dependencies
  */
-import plugin from '../src';
+import plugin from '../';
 
 /**
  * Module constants