$ bazel build -c opt ...
Computing main repo mapping:
Loading:
Loading: 0 packages loaded
Analyzing: 7 targets (1 packages loaded, 0 targets configured)
Analyzing: 7 targets (1 packages loaded, 0 targets configured)

ERROR: //examples/basic/BUILD.bazel:11:9: in deps attribute of py_wheel rule //:basic_wheel:
 alias '//:basic' referring to
 generated file '//:basic.pyd' is misplaced here (expected no files).
 Since this rule was created by the macro 'py_wheel',
 the error might have been caused by the macro implementation
ERROR: //examples/basic/BUILD.bazel:11:9: Analysis of target '//:basic_wheel' (config: 307b5b1) failed
Use --verbose_failures to see the command lines of failed build steps.
ERROR: Analysis of target '//:basic_wheel' failed; build aborted
INFO: Elapsed time: 0.334s, Critical Path: 0.02s
INFO: 1 process: 1 internal.
ERROR: Build did NOT complete successfully