Otherwise the user will be running ./check.sh against the source file and not the built version in build/. Using the source file instead of the build directory will result in package_data (such as csv files) that is not in setup.py to be used for testing, when in fact it they are not available in the build.
Otherwise the user will be running
./check.shagainst the source file and not the built version inbuild/. Using the source file instead of the build directory will result in package_data (such as csv files) that is not in setup.py to be used for testing, when in fact it they are not available in the build.