Errors when I try to run make for the very first time.

[keep94]

I am working through this document: https://github.com/open-telemetry/opentelemetry-collector/blob/main/CONTRIBUTING.md

I have just forked and cloned the opentelemetry-collector-contrib repository per the instructions. I then ran make install-tools

When I run make I see the following errors:

travisk-a01:opentelemetry-collector-contrib traviskeep$ make
addlicense FAILED => add License errors:

2021/09/03 09:09:40 ./receiver/prometheusreceiver/internal/otlp_metricsbuilder.go: open ./receiver/prometheusreceiver/internal/otlp_metricsbuilder.go: too many open files
2021/09/03 09:09:40 ./receiver/awscontainerinsightreceiver/receiver_test.go: open ./receiver/awscontainerinsightreceiver/receiver_test.go: too many open files
2021/09/03 09:09:40 ./receiver/awsecscontainermetricsreceiver/internal/awsecscontainermetrics/translator_test.go: open ./receiver/awsecscontainermetricsreceiver/internal/awsecscontainermetrics/translator_test.go: too many open files
...

What can I do to have make run cleanly? Thanks in advance for your help.