gcc: error: unrecognized command line option ‘-R’ (conda)

[ryanjulian]

Affected branches

master: https://github.com/rlworkgroup/garage/runs/1052747637?check_suite_focus=true#step:6:2712
release-2020.06: https://travis-ci.com/github/rlworkgroup/garage/jobs/379578466#L4857

Affected environment: conda