The current iteration of pkg_install was only tested on Linux and macOS. I currently do not have a Windows development environment available, so things were likely to be missed.

In particular, this failure comes to mind: https://buildkite.com/bazel/rules-pkg/builds/968. This might be caused by RUNFILES_DIR not being in the command's environment.

This is within tests only, though, so bazel running it may "just work".

Confirm and investigate.