Android build memory usage (out of memory) editor vs command line

Hi, I have an app that if I build using the Unity Editor GUI, it builds fine. Memory usage gets up to about 6 GB max.

When I build the exact same project from the command line, I see clang++.exe using up all my system memory (16GB) and the build fails with a out of memory error.

Why would this be? Are there options I'm not aware of that the editor defaults to when running from the GUI, and if so, what are they? Also, this is the TeamCity Unity plugin I'm using to build from command line.

Attached are my Editor build settings that work fine.

These are the options I set in my builder script for command line: buildPlayerOptions.options = BuildOptions.Development | BuildOptions.AllowDebugging | BuildOptions.EnableDeepProfilingSupport | BuildOptions.CompressWithLz4;