Fix Python library paths

.github/workflows/README.md

@@ -1,3 +1,14 @@
 # GitHub Actions
 
 This folder contains various GitHub Actions that are run upon every new version Git tag pushed to GitHub. They build, pack, and upload/deploy/publish packages and binaries for using the newly released version in various programming languages and operating systems.
+
+## Self-hosted runners
+
+GitHub currently doesn't provide ARM64 macOS and Linux runners, so we run self-hosted versions. Jobs run on self-hosted machines aren't isolated (e.g. files created during a job run persist on the real filesystem), and most @actions/* don't have ARM64 builds yet, so self-hosted machines should have tools preinstalled before starting the GitHub Actions runner. These include:
+
+- Go
+- Rust
+- Node.js
+- Python/pyenv
+
+See each workflow YAML file for the specific programs that need to be installed beforehand.

.github/workflows/python.yml

@@ -98,6 +98,8 @@ jobs:
           fi
           if [[ "${{ runner.name }}" == macos-arm64 ]]; then
             pathToPython="/opt/homebrew/bin/python3"
+            # Ensure correct maturin and twine are used.
+            export PATH="/opt/homebrew/bin:$PATH"
           else
             pathToPython="$(which python)"
           fi