message: Use make parameters rather than environment variables
  Environment variables are not persisted across run steps. Each run steps
  invokes a new shell.
diff: @@ -5,10 +5,8 @@ commands:
  steps:
  - checkout
  - run: git submodule update --init
  - - run: export CXXFLAGS_EXTRA="-Werror"
  - - run: export MAKEFLAGS="--keep-going --jobs 2"
  - - run: make nas2d
  - - run: make
  + - run: make --keep-going --jobs 2 CXXFLAGS_EXTRA="-Werror" nas2d
  + - run: make --keep-going --jobs 2 CXXFLAGS_EXTRA="-Werror"
  jobs:
  build-linux:
  @@ -32,9 +30,7 @@ jobs:
  steps:
  - checkout
  - run: git submodule update --init
  - - run: export CXXFLAGS_EXTRA="-Werror"
  - - run: export MAKEFLAGS="--keep-going --jobs 2"
  - - run: make intermediate
  + - run: make --keep-going --jobs 2 CXXFLAGS_EXTRA="-Werror" intermediate
  workflows:
  build:
  