Multiple packages are installed together with Android build-tools package

I noticed that the CMDL installation of the build-tools package using sdkmanager (version 3.0) installs emulator and platform-tools packages.

sdkmanager --verbose "build-tools;30.0.3"

Info: Preparing "Install SDK Patch Applier v4 (revision: 1)".
Info: "Install SDK Patch Applier v4 (revision: 1)" ready.                       
Info: Installing SDK Patch Applier v4 in /opt/android/patcher/v4                
Info: "Install SDK Patch Applier v4 (revision: 1)" complete.                    
Info: "Install SDK Patch Applier v4 (revision: 1)" finished.                    
Info: Preparing "Install Android Emulator (revision: 30.4.5)".                  
Info: "Install Android Emulator (revision: 30.4.5)" ready.                      
Info: Installing Android Emulator in /opt/android/emulator                      
Info: "Install Android Emulator (revision: 30.4.5)" complete.                   
Info: "Install Android Emulator (revision: 30.4.5)" finished.                   
Info: Preparing "Install Android SDK Platform-Tools (revision: 31.0.0)".        
Info: "Install Android SDK Platform-Tools (revision: 31.0.0)" ready.            
Info: Installing Android SDK Platform-Tools in /opt/android/platform-tools      
Info: "Install Android SDK Platform-Tools (revision: 31.0.0)" complete.         
Info: "Install Android SDK Platform-Tools (revision: 31.0.0)" finished.         
Info: Preparing "Install Android SDK Tools (revision: 26.1.1)".                 
Info: "Install Android SDK Tools (revision: 26.1.1)" ready.                     
Info: Installing Android SDK Tools in /opt/android/tools                        
Info: "Install Android SDK Tools (revision: 26.1.1)" complete.                  
Info: "Install Android SDK Tools (revision: 26.1.1)" finished.                  
Info: Preparing "Install Android SDK Build-Tools 30.0.3 (revision: 30.0.3)".    
Info: "Install Android SDK Build-Tools 30.0.3 (revision: 30.0.3)" ready.        
Info: Installing Android SDK Build-Tools 30.0.3 in /opt/android/build-tools/30.0.3
Info: "Install Android SDK Build-Tools 30.0.3 (revision: 30.0.3)" complete.     
Info: "Install Android SDK Build-Tools 30.0.3 (revision: 30.0.3)" finished.

Execution of following command actually ends up with multiple platform-tools installation:

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

...
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.
...

Do you know about any reason of such behavior and is there any way how to skip emulator package installation?

Solution

Behavior described in my question has been modified (tested with sdkmanager version 7.0):

sdkmanager --verbose "build-tools;33.0.0"

Info: Preparing "Install Android SDK Build-Tools 33 (revision: 33.0.0)".
Info: "Install Android SDK Build-Tools 33 (revision: 33.0.0)" ready.            
Info: Installing Android SDK Build-Tools 33 in /opt/android/build-tools/33.0.0  
Info: "Install Android SDK Build-Tools 33 (revision: 33.0.0)" complete.         
Info: "Install Android SDK Build-Tools 33 (revision: 33.0.0)" finished.

I assume that original problem has been therefore fixed.