buildozer: Aidl not detected

When trying to build an app using the command “buildozer android debug” I get this error:

Check configuration tokens
Ensure build layout
Check configuration tokens
Preparing build
Check requirements for android
Install platform
Apache ANT found at /home/toothless204/.buildozer/android/platform/apache-ant-1.9.4
Android SDK found at /home/toothless204/.buildozer/android/platform/android-sdk-20
Android NDK found at /home/toothless204/.buildozer/android/platform/android-ndk-r9c
Refresh Sources:
  Fetching https://dl-ssl.google.com/android/repository/addons_list-2.xml
  Fetched Add-ons List successfully
  Refresh Sources
  Fetching URL: https://dl-ssl.google.com/android/repository/repository-7.xml
Refresh Sources:
  Fetching URL: https://dl-ssl.google.com/android/repository/repository-7.xml
Refresh Sources:
  Fetching URL: https://dl-ssl.google.com/android/repository/repository-7.xml
Refresh Sources:
  Fetching URL: https://dl-ssl.google.com/android/repository/repository-7.xml
Packages available for installation or update: 0

Refresh Sources:
  Fetching https://dl-ssl.google.com/android/repository/addons_list-2.xml
  Fetched Add-ons List successfully
  Refresh Sources
  Fetching URL: https://dl-ssl.google.com/android/repository/repository-7.xml
Refresh Sources:
  Fetching URL: https://dl-ssl.google.com/android/repository/repository-7.xml
Packages available for installation or update: 0

Aidl not found, please install it.

I checked aidl is installed with apt and it says it is.

My machine is running Kubuntu 18.04 if it helps