Build failure `Could not acquire lock at path`

[MaikKlein]

error: Build service could not start build operation: unknown error while handling message: Could not acquire lock at path `Path(str: "/Users/magnus/Library/Developer/Xcode/DerivedData/MoltenVKPackaging-bxdidhamrfqiwyhgsqzwwupeyhcv/Build/Intermediates.noindex/XCBuildData/PIFCache/PROJECT@v11_mod=1579705587.0288634_hash=8b05d8b6ed75d6f658c9c6bb804c0aad-Project.lock")`
** CLEAN FAILED **
4:33
Also get this warning:CMake Warning (dev):
  Policy CMP0042 is not set: MACOSX_RPATH is enabled by default.  Run "cmake
  --help-policy CMP0042" for policy details.  Use the cmake_policy command to
  set the policy and suppress this warning.  MACOSX_RPATH is not specified for the following targets:   SPIRV-Tools-sharedThis warning is for project developers.  Use -Wno-dev to suppress it./Users/magnus/dev/ark/target/release/build/ash-molten-e1cf83056b3a6949/out/MoltenVK-v1.0.38/External/glslang/External/spirv-tools/utils/update_build_version.py:89: DeprecationWarning: 'U' mode is deprecated
  with open(changes_file, mode='rU') as f:
/Users/magnus/dev/ark/target/release/build/ash-molten-e1cf83056b3a6949/out/MoltenVK-v1.0.38/External/glslang/External/spirv-tools/utils/update_build_version.py:89: DeprecationWarning: 'U' mode is deprecated
  with open(changes_file, mode='rU') as f:
Cloning into 'Vulkan-Tools'...
Note: switching to '5824344b3e6783c2dc1953d22e6f1b162d2bca14'.

Unclear yet if that is related to ash-molten or even molten.

[MaikKlein]

Maybe related https://stackoverflow.com/questions/33044633/command-line-option-to-change-xcode-deriveddata-location

[repi]

Weird, never seen that. Which Xcode version was this on?

[magnord]

XCode Version 11.3.1 (11C504)

[repi]

Ok sounds like the latest