How can I fix the "expo-av arm64 no compatible library found" issue in a Codemagic build?

If you're running into the error below:

expo-av arm64 no compatible library found

When building a React Native Android app (especially with Expo), most especially when you increase the Java virtual machine heap size to 5 GB  because your app requires more RAM than the current build machine provides, and thus it only happens in Codemagic and not locally.

Issue:
The error appears when JAVA_TOOL_OPTIONS is set to a high value like -Xmx5g. Sometimes, this high memory setting causes a conflict and, in turn, causes the build to fail during native module resolution for expo-av, especially on ARM64 macOS and some Linux environments.

Workaround / Solution:
Reduce the allocated heap size to e.g. 3GB i.e., the JAVA_TOOL_OPTIONS. Use:

environment:
  vars:
    JAVA_TOOL_OPTIONS: "-Xmx3g"

Or remove it entirely if your app doesn't require more RAM.

Codemagic also offers more powerful machines with more RAM/CPU power.