diff --git a/platformio/package/manager/_install.py b/platformio/package/manager/_install.py
index 003c2386..1bafcf8c 100644
--- a/platformio/package/manager/_install.py
+++ b/platformio/package/manager/_install.py
@@ -21,7 +21,7 @@ import click
 
 from platformio import app, compat, fs, util
 from platformio.package.exception import PackageException
-from platformio.package.meta import PackageItem, PackageSpec
+from platformio.package.meta import PackageItem
 from platformio.package.unpack import FileUnpacker
 from platformio.package.vcsclient import VCSClientFactory
 
@@ -119,30 +119,7 @@ class PackageManagerInstallMixin(object):
         return pkg
 
     def install_dependencies(self, pkg, silent=False):
-        assert isinstance(pkg, PackageItem)
-        manifest = self.load_manifest(pkg)
-        if not manifest.get("dependencies"):
-            return
-        if not silent:
-            self.print_message("Installing dependencies...")
-        for dependency in manifest.get("dependencies"):
-            if not self._install_dependency(dependency, silent) and not silent:
-                self.print_message(
-                    "Warning! Could not install dependency %s for package '%s'"
-                    % (dependency, pkg.metadata.name),
-                    fg="yellow",
-                )
-
-    def _install_dependency(self, dependency, silent=False):
-        spec = PackageSpec(
-            name=dependency.get("name"), requirements=dependency.get("version")
-        )
-        search_filters = {
-            key: value
-            for key, value in dependency.items()
-            if key in ("authors", "platforms", "frameworks")
-        }
-        return self._install(spec, search_filters=search_filters or None, silent=silent)
+        pass
 
     def install_from_url(self, url, spec, checksum=None, silent=False):
         spec = self.ensure_spec(spec)
diff --git a/platformio/package/manager/_uninstall.py b/platformio/package/manager/_uninstall.py
index 2cca8505..322eced6 100644
--- a/platformio/package/manager/_uninstall.py
+++ b/platformio/package/manager/_uninstall.py
@@ -19,7 +19,7 @@ import click
 
 from platformio import fs
 from platformio.package.exception import UnknownPackageError
-from platformio.package.meta import PackageItem, PackageSpec
+from platformio.package.meta import PackageSpec
 
 
 class PackageManagerUninstallMixin(object):
@@ -73,18 +73,4 @@ class PackageManagerUninstallMixin(object):
         return pkg
 
     def uninstall_dependencies(self, pkg, silent=False):
-        assert isinstance(pkg, PackageItem)
-        manifest = self.load_manifest(pkg)
-        if not manifest.get("dependencies"):
-            return
-        if not silent:
-            self.print_message("Removing dependencies...", fg="yellow")
-        for dependency in manifest.get("dependencies"):
-            pkg = self.get_package(
-                PackageSpec(
-                    name=dependency.get("name"), requirements=dependency.get("version")
-                )
-            )
-            if not pkg:
-                continue
-            self._uninstall(pkg, silent=silent)
+        pass
diff --git a/platformio/package/manager/library.py b/platformio/package/manager/library.py
index 1375e84e..a0d1407f 100644
--- a/platformio/package/manager/library.py
+++ b/platformio/package/manager/library.py
@@ -17,7 +17,7 @@ import os
 
 from platformio.package.exception import MissingPackageManifestError
 from platformio.package.manager.base import BasePackageManager
-from platformio.package.meta import PackageSpec, PackageType
+from platformio.package.meta import PackageItem, PackageSpec, PackageType
 from platformio.project.helpers import get_project_global_lib_dir
 
 
@@ -62,3 +62,46 @@ class LibraryPackageManager(BasePackageManager):  # pylint: disable=too-many-anc
                     return os.path.dirname(root)
                 return root
         return path
+
+    def install_dependencies(self, pkg, silent=False):
+        assert isinstance(pkg, PackageItem)
+        manifest = self.load_manifest(pkg)
+        if not manifest.get("dependencies"):
+            return
+        if not silent:
+            self.print_message("Installing dependencies...")
+        for dependency in manifest.get("dependencies"):
+            if not self._install_dependency(dependency, silent) and not silent:
+                self.print_message(
+                    "Warning! Could not install dependency %s for package '%s'"
+                    % (dependency, pkg.metadata.name),
+                    fg="yellow",
+                )
+
+    def _install_dependency(self, dependency, silent=False):
+        spec = PackageSpec(
+            name=dependency.get("name"), requirements=dependency.get("version")
+        )
+        search_filters = {
+            key: value
+            for key, value in dependency.items()
+            if key in ("authors", "platforms", "frameworks")
+        }
+        return self._install(spec, search_filters=search_filters or None, silent=silent)
+
+    def uninstall_dependencies(self, pkg, silent=False):
+        assert isinstance(pkg, PackageItem)
+        manifest = self.load_manifest(pkg)
+        if not manifest.get("dependencies"):
+            return
+        if not silent:
+            self.print_message("Removing dependencies...", fg="yellow")
+        for dependency in manifest.get("dependencies"):
+            pkg = self.get_package(
+                PackageSpec(
+                    name=dependency.get("name"), requirements=dependency.get("version")
+                )
+            )
+            if not pkg:
+                continue
+            self._uninstall(pkg, silent=silent)