scikit-build 0.17.6-1 FTBFS

The package scikit-build (0.17.6-1) is failing to build from source, which is currently blocking its migration.

The build failure is related to test failures in tests test_source_distribution and test_wheel.

```
=========================== short test summary info ============================
SKIPPED [1] tests/test_hello_fortran.py:18: could not import 'numpy': No module named 'numpy'
SKIPPED [1] tests/test_platform.py:120: Requires Windows
SKIPPED [1] tests/test_setup.py:318: pypi.org website not reachable
SKIPPED [24] tests/test_setup.py:584: unsupported configuration: python package fully generated by CMake does *NOT* work. At least __init__.py should be in the project source tree
SKIPPED [1] tests/test_skbuild.py:84: NMake Makefiles generator is not available on Linux
SKIPPED [3] tests/test_skbuild.py:127: Requires Windows
SKIPPED [1] tests/test_skbuild.py:151: Requires Windows
ERROR tests/test_distribution.py::test_source_distribution - subprocess.Calle...
ERROR tests/test_distribution.py::test_wheel - subprocess.CalledProcessError:...
========== 191 passed, 32 skipped, 19 deselected, 2 errors in 56.98s ===========
make[1]: *** [debian/rules:35: override_dh_auto_test] Error 1
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
make: *** [debian/rules:23: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2
```

Full log: https://launchpadlibrarian.net/689479502/buildlog_ubuntu-mantic-amd64.scikit-build_0.17.6-1_BUILDING.txt.gz