I just repo synced, and can no longer build on darwin (building on linux works fine)
$ . build/envsetup.sh
$ make -j aapt2
============================================
PLATFORM_VERSION_CODENAME=R
PLATFORM_VERSION=R
TARGET_PRODUCT=aosp_arm
TARGET_BUILD_VARIANT=eng
TARGET_BUILD_TYPE=release
TARGET_ARCH=arm
TARGET_ARCH_VARIANT=armv7-a-neon
TARGET_CPU_VARIANT=generic
HOST_ARCH=x86_64
HOST_OS=darwin
HOST_OS_EXTRA=Darwin-18.7.0-x86_64-10.14.6
HOST_BUILD_TYPE=release
BUILD_ID=QD1A.190821.011
OUT_DIR=out
============================================
[100% 1/1] out/soong/.bootstrap/bin/soong_build out/soong/build.ninja
FAILED: out/soong/build.ninja
out/soong/.bootstrap/bin/soong_build -t -l out/.module_paths/Android.bp.list -b out/soong -n out -d out/soong/build.ninja.d -globFile out/soong/.bootstrap/build-globs.ninja -o out/soong/build.ninja Android.bp
error: external/adhd/cras/client/cras-sys/Android.bp:1:1: module "libcras_sys" variant "darwin_x86_64_rlib": depends on disabled module "libdata_model"
error: external/adhd/cras/client/cras-sys/Android.bp:1:1: module "libcras_sys" variant "darwin_x86_64_rlib": depends on disabled module "libdata_model"
11:44:37 soong bootstrap failed with: exit status 1
#### failed to build some targets (38 seconds) ####