build error on mac os

[jspeis]

When I try to build on my machine (macOS 10.14.6, rustc 1.40.0-nightly).

I get an unable to clone libinjection error. I've included a trace below, but wondering if there are any special steps I need to take to get it to build locally? Thanks!

 ✘  ~/code/libinjection-rs   master  cargo build
   Compiling libinjection v0.1.1 (/Users/me/code/libinjection-rs)
error: failed to run custom build command for `libinjection v0.1.1 (/Users/me/code/libinjection-rs)`

Caused by:
  process didn't exit successfully: `/Users/me/code/libinjection-rs/target/debug/build/libinjection-e6642227de8a378d/build-script-build` (exit code: 101)
--- stderr
thread 'main' panicked at 'unable to clone libinjection', build.rs:54:9
stack backtrace:
   0: backtrace::backtrace::libunwind::trace
             at /Users/runner/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.40/src/backtrace/libunwind.rs:88
   1: backtrace::backtrace::trace_unsynchronized
             at /Users/runner/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.40/src/backtrace/mod.rs:66
   2: std::sys_common::backtrace::_print_fmt
             at src/libstd/sys_common/backtrace.rs:77
   3: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
             at src/libstd/sys_common/backtrace.rs:61
   4: core::fmt::write
             at src/libcore/fmt/mod.rs:1028
   5: std::io::Write::write_fmt
             at src/libstd/io/mod.rs:1412
   6: std::sys_common::backtrace::_print
             at src/libstd/sys_common/backtrace.rs:65
   7: std::sys_common::backtrace::print
             at src/libstd/sys_common/backtrace.rs:50
   8: std::panicking::default_hook::{{closure}}
             at src/libstd/panicking.rs:188
   9: std::panicking::default_hook
             at src/libstd/panicking.rs:205
  10: std::panicking::rust_panic_with_hook
             at src/libstd/panicking.rs:464
  11: std::panicking::begin_panic
             at /rustc/38048763e885a3ee139abf39d59a530b16484150/src/libstd/panicking.rs:400
  12: build_script_build::main
             at ./build.rs:54