message: also avoid rebuilding cached RTIM
diff: @@ -63,8 +63,8 @@ jobs:
  - name: Install rustup-toolchain-install-master and xargo
  shell: bash
  run: |
  - cargo install rustup-toolchain-install-master
  - # Only install xargo if we don't have it cached
  + # Only install tools if we don't have them cached
  + if ! which rustup-toolchain-install-master; then cargo install rustup-toolchain-install-master; fi
  if ! which xargo; then cargo install xargo; fi
  - name: Install "master" toolchain
  