diff --git a/app/modules/library/sagas.js b/app/modules/library/sagas.js
index 52a60d34..d7d6e777 100644
--- a/app/modules/library/sagas.js
+++ b/app/modules/library/sagas.js
@@ -17,6 +17,7 @@
 /* eslint-disable no-constant-condition */
 
 import * as actions from './actions';
+import * as pathlib from '@core/path';
 import * as selectors from './selectors';
 
 import {
@@ -292,13 +293,23 @@ function* watchInstallLibrary() {
     let err,
       result = null;
     try {
-      let args = ['lib'];
+      let args = ['pkg', 'install'];
+      const isPlatformIOProject = storageDir
+        ? yield call(backendFetchData, {
+            query: 'os.is_file',
+            params: [pathlib.join(storageDir, 'platformio.ini')],
+          })
+        : false;
       if (storageDir) {
-        args = args.concat(['--storage-dir', storageDir]);
-      } else {
+        args = args.concat([
+          isPlatformIOProject ? '--project-dir' : '--storage-dir',
+          storageDir,
+        ]);
+      }
+      if (!isPlatformIOProject) {
         args.push('--global');
       }
-      args = args.concat(['install', lib]);
+      args = args.concat(['--library', lib]);
       result = yield call(backendFetchData, {
         query: 'core.call',
         params: [args, { force_subprocess: true }],
diff --git a/app/modules/platform/sagas.js b/app/modules/platform/sagas.js
index 354a2d97..9a9c787d 100644
--- a/app/modules/platform/sagas.js
+++ b/app/modules/platform/sagas.js
@@ -290,7 +290,10 @@ function* watchInstallPlatform() {
 
       result = yield call(backendFetchData, {
         query: 'core.call',
-        params: [['platform', 'install', platform], { force_subprocess: true }],
+        params: [
+          ['pkg', 'install', '--global', '--platform', platform],
+          { force_subprocess: true },
+        ],
       });
 
       ReactGA.timing({
diff --git a/app/modules/project/sagas.jsx b/app/modules/project/sagas.jsx
index c41c121b..217f658b 100644
--- a/app/modules/project/sagas.jsx
+++ b/app/modules/project/sagas.jsx
@@ -444,7 +444,7 @@ function* watchSaveProjectConfig() {
       try {
         yield call(ensureUserConsent, PROJECT_CONFIG_SAVE_CONSENT_ID, {
           content: `Warning!
-          The entire file contents or platformio.ini will be rewritten with the current
+          The entire file contents of platformio.ini will be rewritten with the current
           configuration defined in this UI.
           Continue to save the configuration?`,
           okText: 'Save',
diff --git a/package.json b/package.json
index afea3965..c22b59ac 100755
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "platformio-home",
-  "version": "3.4.1",
+  "version": "3.4.2",
   "description": "PlatformIO Home",
   "repository": {
     "type": "git",