I am using the sdkmanager found in the commandline-tools .

When installing 2 packages that have the same dependencies, some packages are installed twice.

For example, running

sdkmanager --verbose "platform-tools" "build-tools;30.0.3"

logs:

Info: Failed to sort dependencies, returning partially-sorted list

...

Warning: Package "com.android.repository.impl.generated.v1.RemotePackage@5f56a566" (platform-tools) should be installed in "/opt/android/platform-tools" but it already exists. Installing in "/opt/android/platform-tools-2" instead.

The issue is reproducible in Windows, Linux using older and the latest (commandlinetools-win-8092744) version.