deno: Can't build master

Running:

RUST_BACKTRACE=1 cargo build -vv

Yields:

Unable to load AWS_CREDENTIAL_FILE ()

Full stack trace:

--- stderr
Failed to fetch file gs://chromium-clang-format/025ca7c75f37ef4a40f3a67d81ddd11d7d0cdb9b for /Users/jamiebuilds/Projects/deno/core/libdeno/buildtools/mac/clang-format. [Err: /Users/jamiebuilds/Projects/deno/third_party/depot_tools/external_bin/gsutil/gsutil_4.28/gsutil/third_party/boto/boto/pyami/config.py:69: UserWarning: Unable to load AWS_CREDENTIAL_FILE ()
  warnings.warn('Unable to load AWS_CREDENTIAL_FILE (%s)' % full_path)
]
thread 'main' panicked at 'assertion failed: status.success()', core/build.rs:94:9
stack backtrace:
   0: backtrace::backtrace::libunwind::trace
             at /Users/vsts/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/libunwind.rs:88
   1: backtrace::backtrace::trace_unsynchronized
             at /Users/vsts/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/mod.rs:66
   2: std::sys_common::backtrace::_print
             at src/libstd/sys_common/backtrace.rs:47
   3: std::sys_common::backtrace::print
             at src/libstd/sys_common/backtrace.rs:36
   4: std::panicking::default_hook::{{closure}}
             at src/libstd/panicking.rs:200
   5: std::panicking::default_hook
             at src/libstd/panicking.rs:214
   6: std::panicking::rust_panic_with_hook
             at src/libstd/panicking.rs:477
   7: std::panicking::begin_panic
   8: build_script_build::gn::Build::run
             at core/build.rs:94
   9: build_script_build::main
             at core/build.rs:9
  10: std::rt::lang_start::{{closure}}
             at /rustc/625451e376bb2e5283fc4741caa0a3e8a2ca4d54/src/libstd/rt.rs:64
  11: std::rt::lang_start_internal::{{closure}}
             at src/libstd/rt.rs:49
  12: std::panicking::try::do_call
             at src/libstd/panicking.rs:296
  13: __rust_maybe_catch_panic
             at src/libpanic_unwind/lib.rs:80
  14: std::panicking::try
             at src/libstd/panicking.rs:275
  15: std::panic::catch_unwind
             at src/libstd/panic.rs:394
  16: std::rt::lang_start_internal
             at src/libstd/rt.rs:48
  17: std::rt::lang_start
             at /rustc/625451e376bb2e5283fc4741caa0a3e8a2ca4d54/src/libstd/rt.rs:64
  18: build_script_build::main

I did already have depot_tools cloned on my machine and setup in my PATH but I removed it to see if there was some unusual conflict there