Comment.

.travis.yml

@@ -30,7 +30,7 @@ install:
  - echo "$(ghc --version) [$(ghc --print-project-git-commit-id 2> /dev/null || echo '?')]"
  - travis_retry cabal update
  - cabal install --only-dependencies
- - cabal install "Cabal == $CABALVER.*"
+ - cabal install "Cabal == $CABALVER.*"  # Use the same Cabal version for Setup.hs and cabal-install
 
 # Here starts the actual work to be performed for the package under test; any command which exits with a non-zero exit code causes the build to fail.
 script: