Errors related to /tmp folder inside Docker container. Why use of Tempfile?

[bitcrumb]

I am being faced with the following error when running a Fastlane lane in a Docker container (based on debian:bullseye-slim):

/usr/lib/ruby/2.7.0/fileutils.rb:548:in `rename': Invalid cross-device link @ rb_file_s_rename - (/tmp/fastlaneIncrementVersionName20230307-13093-1g2hon7, ./android/app/build.gradle) (Errno::EXDEV)

/usr/lib/ruby/2.7.0/fileutils.rb:1424:in `utime': \e[31m[!] Operation not permitted @ apply2files - ./android/app/build.gradle\e[0m (Errno::EPERM)

Any specific reason this plugin uses a temporary file in the /tmp folder for making changes to the build.gradle instead of replacing directly in the original build.gradle file?

This seems like an unnecessary detour?

[bitcrumb]

I think the issue is that you can't move files over different mounts, so it would probably work if the file was copied & removed instead (or no Tempfile was used at all).