Description of issue: Today, after fighting some weird issues where some feature would work in my editor but not on the devices we install the builds to, I decided to do a Clean Build in the Cloud Build for the project. The build was finished surprisingly fast, but also a weird mix of failure and success: the build logs said it was a failure, but a message was posted to our Slack channel stating success. It also publishes an APK to the 'Share' location. The real problem I have is that it did not perform a real Clean Build - it threw away a cache, but somehow loaded a different - older - one. The errors in the build log, for example, do not reflect the latest version of the code, even though the "Changes" tab in Cloud Build does. I am sure I have seen a message in the "compact log" about not finding the library while it was building, but that message is not in the current logs anymore. Instead, they contain a message about fetching a library. Unity version: Should be 2017.4.14f1 in Cloud Build, but loads a cache for 2017.1.1f1 (which we used to build with until recently) Source control: Git repository. Not sure what to say here. Pull seems to work fine. Local build platform: MacOS or Windows, using Unity 2017.4.14f1 Build target: - Dev - Ug* Eng* Rea* 123 (Name has been trimmed because of NDA - it's a little too informative about the project - but the staff should be able to find it based on this info. If not, contact me via PM or e-mail). It's configured to build for Android, using Unity 2017.4.14f1. Build #34 was the one where we did the "Clean" build. Project name: 943-w*rea*123*ug* (Name has been trimmed because of NDA-related stuff (it's a little too informative about the project) but the staff should be able to find it based on this info. If not, contact me via PM or e-mail) Build log (relevant chunk): 31: Download of cache file library_2017_1_1f1 finished, size is 581233345 bytes [...*snip*...] 42: [Unity] COMMAND LINE ARGUMENTS: 43: [Unity] /UNITY_PATH/Unity/Unity-2017_1_1f1/Unity.app/Contents/MacOS/Unity [...*snip*...] 65: [Unity] Initialize engine version: 2017.1.1f1 (5d30cf096e79) Does it build locally from a fresh checkout? Irrelevant to the issue at hand.